Presentation is loading. Please wait.

Presentation is loading. Please wait.

To find the surface area of a cuboid

Similar presentations


Presentation on theme: "To find the surface area of a cuboid"— Presentation transcript:

1 To find the surface area of a cuboid
9/18/2018

2 Find the surface area of the cuboids
10 cm 3.5 cm 3 ? 1 cm 1 cm 3.6 cm 3cm ? 9/18/2018 5cm

3 Learning Objective Draw the position of shapes on
a coordinate grid after rotations and translations. 9/18/2018

4 This shape has moved 4 places to the right, and 2 places up.
Translation 10 Translation: Translation means moving a shape to a new location. Watch these examples: 9 8 This shape has moved 4 places to the right, and 2 places up. 7 6 5 4 3 2 Congruent Shapes 1 9/18/2018 1 2 3 4 5 6 7 8 9 11 12 13 10

5 When a shape is translated the image is congruent to the original.
Translations When a shape is translated the image is congruent to the original. The orientations of the original shape and its image are the same. An inverse translation maps the image that has been translated back onto the original object. What is the inverse of a translation 7 units to the left and 3 units down? The inverse is an equal move in the opposite direction. That is, 7 units right and 3 units up. 9/18/2018

6 10 9 This shape will be translated 6 places to the right, and 2 places down. What will it look like? 8 7 6 5 4 3 2 1 9/18/2018 1 2 3 4 5 6 7 8 9 10 11 12 13

7 This shape will be translated 2 places to the right, and 4 places up.
10 9 8 7 This shape will be translated 2 places to the right, and 4 places up. 6 5 4 3 2 1 9/18/2018 1 2 3 4 5 6 7 8 9 10 11 12 13

8 10 9 6 squares left, and 1 square down. 8 7 6 What has this shape been translated by? 5 4 3 2 1 9/18/2018 1 2 3 4 5 6 7 8 9 11 12 13 10

9 Describing translations
When we describe a translation we always give the movement left or right first followed by the movement up or down. We can describe translations using vectors. For example, the vector describes a translation 3 right and 4 down. –4 3 As with coordinates, positive numbers indicate movements up or to the right and negative numbers are used for movements down or to the left. Compare a translation given as an angle and a distance to using bearings. For example, an object could be translated through 5cm on a bearing of 125º. A different way of describing a translation is to give the direction as an angle and the distance as a length. 9/18/2018

10 Translations on a coordinate grid
y A(5, 7) The vertices of a triangle lie on the points A(5, 7), B(3, 2) and C(–2, 6). C(–2, 6) 7 6 5 4 3 2 B(3, 2) Translate the shape 3 squares left and 8 squares down. Label each point in the image. 1 –7 –6 –5 –4 –3 –2 –1 1 2 3 4 5 6 7 x –1 A’(2, –1) –2 C’(–5, –2) –3 Point out that when we translate shapes on a coordinate grid we can find the coordinates of the vertices of the image shape by adding to the original’s x-coordinates the size of the translation to the right (or subtracting the size of a translation to the left); and adding to the original’s y-coordinates the size of the translation up (or subtracting the size of a translation down). –4 What do you notice about each point and its image? –5 –6 B’(0, –6) –7 9/18/2018

11 Translations on a coordinate grid
y The coordinates of vertex A of this shape are (–4, –2). 7 6 5 4 3 When the shape is translated the coordinates of vertex A’ are (3, 2). 2 A’(3, 2) 1 –7 –6 –5 –4 –3 –2 –1 1 2 3 4 5 6 7 x –1 –2 A(–4, –2) What translation will map the shape onto its image? –3 Tell pupils that we can work this out by subtracting the coordinate of the original shape from the coordinate of the image. The difference between the x-coordinates is 7 (3 – –4) and the difference between the y-coordinates is 4 (2 – –2). The required translation is therefore 7 right and 4 up. –4 –5 –6 –7 7 right 4 up 9/18/2018

12 Translations on a coordinate grid
1 2 3 4 5 6 –2 –3 –4 –5 –6 –7 –1 y x 7 The coordinates of vertex A of this shape are (3, –4). When the shape is translated the coordinates of vertex A’ are(–3, 3). A’(–3, 3) What translation will map the shape onto its image? The difference between the x-coordinates is –6 (–3 – 3) and the difference between the y-coordinates is 7 (3 – –4). The required translation is therefore 6 left and 7 up. If required this slide can be copied and modified to produce more examples. To change the shapes, go to View/toolbars/drawing to open the drawing toolbar. Select the shape and using the drawing toolbar, click on draw/edit points to drag the points to different positions. Edit the new coordinates as necessary. A(3, –4) 6 left 7 up 9/18/2018

13 Translation golf In this game pupils are required to estimate the required translation to move the ball to the hole. The length of one unit is shown in the top right-hand corner. To translate the ball to the left or down, a negative number must be used. Challenge pupils to get the ball into the hole in as few moves as possible. 9/18/2018

14 Look at the DENOMINATORS. What are the MULTIPLES?
Look at the DENOMINATORS. What are the MULTIPLES? 9: 9, 18, 27, 36, 45, 54, … 12: 12, 24, 36, 48, 60, … 6: 6, 12, 18, 24, 30, 36, 48, … 4: 4, 8, 12, 16, 20, 24, 28, 32, 36,… 9/18/2018

15 2/4 3/5 6/10 1/2 9/18/2018

16 3/6 7/8 3/4 4/4 2/3 9/18/2018

17 Learning Objective Draw the position of shapes on
a coordinate grid after rotations and translations. 9/18/2018

18 Rotational Symmetry A complete turn (360°) 90° Rotation Clockwise
Centre of Rotation 180° Rotation Clockwise 9/18/2018 270° Rotation Clockwise

19 Centre of Rotation 9/18/2018

20 We are going to rotate this rectangle 90° clockwise.
Centre of Rotation 9/18/2018

21 Rotate 90° Anti-Clockwise
Rotate 90° Clockwise Rotate 90° Anti-Clockwise Rotate 90° Anti-Clockwise Rotate 180° Clockwise 9/18/2018 Click on each shape to reveal the answer

22 To work out the square and square root of numbers.
9/18/2018

23 Learning Objective To find the next number in a sequence, including decimal and Fraction sequences. 9/18/2018

24 What about guess the rule?
Look at these number sequences carefully can you guess the next 2 numbers? What about guess the rule? +10 30 40 50 60 70 80 +3 17 20 23 26 29 32 -7 48 41 34 27 20 13 9/18/2018

25 Can you work out the missing numbers in each of these sequences?
+25 50 75 100 125 150 175 +20 30 50 70 90 110 130 -5 196 191 181 176 171 186 -10 306 296 286 276 266 256 9/18/2018

26 Now try these sequences – think carefully and guess the last number!
+1, +2, +3 … 1 2 4 7 11 16 double 3 6 12 24 96 48 + 1.5 0.5 2 3.5 5 6.5 8 -3 7 4 1 -2 -5 -8 9/18/2018

27 Now try these sequences – think carefully and guess the last number!
+ 1/3 2 1/3 2 2/3 3 3 2/3 + 2 2/3 2 2 2/3 3 1/3 4 4 2/3 9/18/2018

28 See if you can find out something about Fibonacci!
This is a really famous number sequence which was discovered by an Italian mathematician a long time ago. It is called the Fibonacci sequence and can be seen in many natural things like pine cones and sunflowers!!! etc… Can you see how it is made? What will the next number be? 34! See if you can find out something about Fibonacci! 9/18/2018

29 Fibonacci’s number pattern can also be seen elsewhere in nature:
with the rabbit population with snail shells with the bones in your fingers with pine cones with the stars in the solar system 9/18/2018

30 For these sequences I have done 2 maths functions!
Guess my rule! For these sequences I have done 2 maths functions! 3 7 15 31 63 127 x2 +1 x2 -1 2 3 5 9 17 33 9/18/2018

31 24 42 28 1 2 3 1 9/18/2018

32 Learning Objective To use functions machines to recognise number sequences. 9/18/2018

33 Single machines INPUT OUTPUT PROCESSOR Imagine that we have a robot to help us make patterns. 1 6 2 7 5 10 + 5

34 Single machines INPUT OUTPUT PROCESSOR Imagine that we have a robot to help us make patterns 17 10 20 13 25 18 − 7

35 Single machines INPUT OUTPUT PROCESSOR Imagine that we have a robot to help us make patterns 3 12 6 24 12 48 × 4

36 Single machines INPUT OUTPUT PROCESSOR Imagine that we have a robot to help us make patterns 12 4 33 11 27 9 ÷ 3

37 Exercises 1 + 2 × 7 - 7 ÷ 6 × 4 ÷ 9 Here are single number machines
What is the output since we know the input? a 1 3 d 11 77 + 2 × 7 3 5 9 63 5 7 7 49 b 9 2 e 12 2 - 7 ÷ 6 13 6 36 6 29 22 66 11 c 3 12 f 18 2 × 4 ÷ 9 7 28 54 6 9 36 81 9

38 Exercises 2 + 9 × 9 - 11 ÷ 7 × 8 ÷ 11 Here are single number machines.
What is the output since we know the input? a 1 10 d 6 54 + 9 × 9 3 12 4 36 5 14 9 81 b 11 e 21 3 - 11 ÷ 7 24 13 49 7 36 25 63 9 c 4 32 f 11 1 × 8 ÷ 11 7 56 33 3 9 72 66 6

39 Inverse machines Can we calculate the input since we know the output? INPUT INVERSE PROCESSOR OUTPUT 6 12 8 14 17 23 − 6 + 6 + 6

40 Inverse machines Can we calculate the input since we know the output? INPUT INVERSE PROCESSOR OUTPUT 40 32 23 15 15 7 + 8 − 8 − 8

41 Inverse machines Can we calculate the input since we know the output? INPUT INVERSE PROCESSOR OUTPUT 6 30 9 45 11 55 ÷ 5 × 5 × 5

42 Inverse machines Can we calculate the input since we know the output? INPUT INVERSE PROCESSOR OUTPUT 12 3 20 5 48 12 × 4 ÷ 4 ÷ 4

43 Exercises 3 + 3 × 12 - 6 ÷ 13 × 6 ÷ 15 Here are single number machines
What is the input since we know the output? a 4 7 d 5 60 + 3 × 12 8 11 2 24 31 34 6 72 b 12 6 e 39 3 - 6 ÷ 13 14 8 65 5 18 12 91 7 c 7 42 f 30 2 × 6 ÷ 15 11 66 75 5 12 72 105 7

44 Exercises 4 Here are single number machines What is the input since we know the output? a 6 19 d 2 28 + 13 × 14 3 16 4 56 12 25 6 84 b 22 5 e 32 2 - 17 ÷ 16 26 9 80 5 28 11 112 7 c 3 45 f 76 4 × 15 ÷ 19 9 135 38 2 11 165 114 6

45 A Broken Processor INPUT OUTPUT ?????????? Imagine that the processor has broken!!!!! 5 10 10 15 25 30 ??? + 5

46 A Broken Processor INPUT OUTPUT ??????????? Imagine that the processor has broken!!!!! 17 9 21 13 25 17 ??? − 8

47 A Broken Processor INPUT OUTPUT ?????????? Imagine that the processor has broken!!!!! 3 21 6 42 7 49 ??? × 7

48 A Broken Processor INPUT OUTPUT ?????????? Imagine that the processor has broken!!!!! 81 9 18 2 36 4 ??? ÷ 9

49 Exercises 5 + 8 × 11 - 5 ÷ 10 × 6 ÷ 17 Here are single number machines
What is the action since we know what the input and output are? a 1 9 d 3 33 + 8 × 11 3 11 7 77 5 13 10 110 b 10 5 e 10 1 - 5 ÷ 10 41 36 30 3 88 83 120 12 c 4 24 f 34 2 × 6 ÷ 17 7 42 102 6 9 54 51 3

50 Exercises 6 + 4 × 8 - 7 ÷ 3 × 5 ÷ 7 Here are single number machines
What is the action since we know what the input and output are? a 5 9 d 3 24 + 4 × 8 11 15 7 56 23 27 10 80 b 15 8 e 39 13 - 7 ÷ 3 42 35 66 22 88 81 120 40 c 4 20 f 42 6 × 5 ÷ 7 7 35 63 9 9 45 77 11

51 Double vision 4 12 13 7 21 22 8 24 25 × 3 + 1 Machine 1 Machine 2
Imagine that we have two robots to help us make patterns The output of machine 1 is input to machine 2 4 12 13 7 21 22 8 24 25 × 3 + 1 Machine 1 Machine 2

52 Double vision 4 16 11 3 12 7 11 44 39 × 4 − 5 Machine 1 Machine 2
Imagine that we have two robots to help us make patterns The output of machine 1 is input to machine 2 4 16 11 3 12 7 11 44 39 × 4 − 5 Machine 1 Machine 2

53 Exercises 7 × 5 + 6 × 7 - 11 × 6 - 5 Here are two stage machines
What is the output since we know the input? a 2 16 × 5 + 6 4 26 8 46 b 5 24 × 7 - 11 10 59 7 38 c 6 31 × 6 - 5 3 13 1 1

54 Exercises 8 ÷ 2 + 2 ÷ 5 - 5 ÷ 7 + 6 Here are two stage machines
What is the output since we know the input? a 6 5 ÷ 2 + 2 8 6 10 7 b 45 4 ÷ 5 - 5 55 6 75 10 c 42 12 ÷ 7 + 6 21 9 35 11

55 30 56 52 1 2 3 1 1 9/18/2018

56 Learning Objective To know to find and extend number sequences and patterns 9/18/2018

57 Number Patterns - Matches
Gareth uses matches to produce hexagon patterns Draw a rough draft of the next two patterns. Pattern 1 Pattern2 Pattern 3

58 Number Patterns - Matches
Gareth uses matches to produce hexagon patterns Pattern 4 Pattern 5

59 Number Patterns - Matches
Gareth uses matches to produce hexagon patterns 1. 2. 3. 4. 5. Pattern Number 1 2 3 4 5 6 7 8 9 10 Number of matches 6 11 16 21 26 31 36 41 46 51 +5 +5 +5 +5 +5 +5 +5 +5 +5

60 Number Patterns – Counters
Sion uses counters to produce coloured patterns Draw a rough draft of the next two patterns. Pattern 1 Pattern 2 Pattern 3

61 Number Patterns – Counters
Sion uses counters to produce coloured patterns. Pattern 4 Pattern 5

62 Number Patterns – Counters
Sion uses counters to produce number patterns Complete the table below, what is the pattern? Red 1 2 3 4 5 6 7 8 9 10 Green 4 7 10 13 16 19 22 25 28 31 +3 +3 +3 +3 +3 +3 +3 +3 +3

63 Beginning to Use Algebra
It is easy enough to discover how many need to be added every time. What about the following pattern? What rules need to be used to calculate the number of matches since we know the pattern number? Think about the DOUBLE Robots!! Pattern Number 1 2 3 4 5 6 7 8 9 10 Number of matches 6 11 16 21 26 31 36 41 46 51 1 6 × 5 + 1 2 11 3 16

64 Beginning to Use Algebra
It is easy enough to discover how many need to be added every time. What about the following pattern? What rules need to be used to calculate the number of green counters since we know the number of red counters? Think about the double Robots again. Red 1 2 3 4 5 6 7 8 9 10 Green 4 7 10 13 16 19 22 25 28 31 1 4 × 3 + 1 2 7 3 10

65 Other Number Patterns Consider the following pattern using squares..
The name of the above sequence is SQUARE NUMBERS 5 × 5 4 × 4 3 × 3 2 × 2 1 × 1 1 4 9 16 25 +3 +5 +7 +9

66 Other Number Patterns Consider the following pattern using dots.
The name of the above sequence is TRIANGLE NUMBERS 1 3 6 10 15 +2 +3 +4 +5


Download ppt "To find the surface area of a cuboid"

Similar presentations


Ads by Google