Download presentation

Presentation is loading. Please wait.

Published byMitchell Warring Modified over 2 years ago

1
Co-ordinate Geometry 1 Contents 1.Distance between points (Simple)Distance between points (Simple) 2.Pythagoras and Distance between two pointsPythagoras and Distance between two points 3.The Distance FormulaThe Distance Formula 4.Midpoint FormulaMidpoint Formula 5.GradientGradient 6.Equations of straight lineEquations of straight line 7.Parallel LinesParallel Lines Press “ctrl-A” GeoGebra

2
Co-ordinate Geometry 2 10.1 Distance between Two Points (1/5)1 2 3 4 56 7 89101112131415 0 1 2 3 4 5 6 7 -2 -3 Distance from (0,3) to (7,3) = 7

3
Co-ordinate Geometry 3 10.1 Distance between Two Points (2/5)1 2 3 4 56 7 89101112131415 0 1 2 3 4 5 6 7 -2 -3 Distance from (7,-3) to (7,3) = 6

4
Co-ordinate Geometry 4 10.1 Distance between Two Points (3/5)1 2 3 4 56 7 89101112131415 0 1 2 3 4 5 6 7 -2 -3 Distance from (2,5) to (7,5) = 5

5
Co-ordinate Geometry 5 10.1 Distance between Two Points (4/5)1 2 3 4 56 7 89101112131415 0 1 2 3 4 5 6 7 -2 -3 Distance from (13,7) to (13,2) = 5

6
Co-ordinate Geometry 6 10.1 Distance between Two Points (5/5)1 2 3 4 56 7 89101112131415 0 1 2 3 4 5 6 7 -2 -3 Distance from (3,-2) to (12,-2) = 9

7
Co-ordinate Geometry 7 1 2 3 4 56 7 8 0 1 2 3 4 5 6 7 -2 -3 10.1 Distance – Pythagoras (1/3) Distance from (1,1) to (4,5) = 5 3 4 c 2 = a 2 + b 2 c 2 = 3 2 + 4 2 c 2 = 9 + 16 c 2 = 25 c = 5 GeoGebra

8
Co-ordinate Geometry 8 1 2 3 4 56 7 8 0 1 2 3 4 5 6 7 -2 -3 10.1 Distance – Pythagoras (2/3) Distance from (2,2) to (7,6) = 41 5 4 c 2 = a 2 + b 2 c 2 = 5 2 + 4 2 c 2 = 25 + 16 c 2 = 41 c = 41

9
Co-ordinate Geometry 9 1 2 3 4 56 7 8 0 1 2 3 4 5 6 7 -2 -3 10.1 Distance – Pythagoras (3/3) Distance from (-1,-2) to (5,5) = 85 6 7 c 2 = a 2 + b 2 c 2 = 6 2 + 7 2 c 2 = 36 + 49 c 2 = 85 c = 85

10
Co-ordinate Geometry 10 1 2 3 4 56 7 8 0 1 2 3 4 5 6 7 -2 -3 10.1 Distance – Pythagoras (1/1) Distance from (1,-2) to (7,7) 6 9 c 2 = a 2 + b 2 c 2 = 6 2 + 9 2 c 2 = 36 + 81 c 2 = 117 c = 10.816 65 c ≈ 10.8 ≈ 10.8

11
Co-ordinate Geometry 11 1 2 3 4 56 7 8 0 1 2 3 4 5 6 7 -2 -3 10.2 Distance Formula (1/3) Distance from (3,-2) to (7,5)? (3,-2) (7,5) d = (x 2 -x 1 )2 +(y 2 -y 1 ) 2 = (7 - 3) 2 +(5 - - 2) 2 (x 1,y 1 ) (x 2,y 2 ) = 4 2 + 7 2 = 16 + 49 = 65 (as surd) Exact ≈ 8.06 (approx) GeoGebra

12
Co-ordinate Geometry 12 10.2 Distance Formula (2/3) Distance from (12,2) to (4,5)? d = (x 2 -x 1 ) 2 +(y 2 -y 1 ) 2 = (4 - 12) 2 +(5 -2) 2 (x 1,y 1 ) (x 2,y 2 ) = (-8) 2 + 3 2 = 64 + 9 = 73 (as surd) Exact

13
Co-ordinate Geometry 13 10.2 Distance Formula (3/3) Distance from (6,2) to (7,5)? d = (x 2 -x 1 ) 2 +(y 2 -y 1 ) 2 = (7 - 6) 2 +(5 -2) 2 (x 1,y 1 ) (x 2,y 2 ) = 1 2 + 3 2 = 1 + 9 = 10 (2 decimal places) Approximate = 3.16

14
Co-ordinate Geometry 14 1 2 3 4 56 7 8 0 1 2 3 4 5 6 7 -2 -3 10.3 Midpoint Formula (1/2) Midpoint of (3,-2) to (7,6)? (3,-2) (7,6) (x 1,y 1 ) (x 2,y 2 ) Midpoint M. M = ( x 1 +x 2 2 y 1 +y 2 2 ), = ( 3+7 2 -2+6 2 ), = (5, 2) GeoGebra

15
Co-ordinate Geometry 15 10.3 Midpoint Formula (2/2) Midpoint of (12,2) to (4,5)? (x 1,y 1 ) (x 2,y 2 ) M = ( x 1 +x 2 2 y 1 +y 2 2 ), = ( 12+4 2 2+5 2 ), = (8, 3.5)

16
Co-ordinate Geometry 16 4 7-3 10.4 Gradient (1/5)Gradient rate of change. is the rate of change. Gradient = Horizontal Run Vertical Rise 123456 1 2 3 4 5 6 7 (1,3) (5,7) 5-1 4 m m = rise run = 4444 = 1 GeoGebra

17
Co-ordinate Geometry 17 -4 7-1 10.4 Gradient (2/5)123456 1 2 3 4 5 6 7 (5,1) (1,7) 1-5 6 m = rise run = 6 -4 = 3 -2 = -3 2 Wolfram Demo

18
Co-ordinate Geometry 18 10.4 Gradient (3/5) Gradients Gradients can be: Positive Increasing An Increasing function ZeroHorizontal Negative Decreasing A Decreasing function

19
Co-ordinate Geometry 19 10.4 Gradient Formula (4/5)123456 1 2 3 4 5 6 7 y y (x 2,y 2 ) (x 1,y 1 ) y 2 -y 1 x 2 -x 1 m = rise run = y 2 -y 1 x 2 -x 1

20
Co-ordinate Geometry 20 10.4 Gradient Formula (5/5) Gradient Gradient of (4,2) to (8,10)? (x 1,y 1 ) (x 2,y 2 ) m = y 2 -y 1 x 2 -x 1 = 10-2 8-4 = 8484 = 2 Gradient Gradient of (5,9) to (7,3)? (x 1,y 1 ) (x 2,y 2 ) m = y 2 -y 1 x 2 -x 1 = 3-9 7-5 = -6 2 = -3

21
Co-ordinate Geometry 21 10.5 Linear Equations Two types of equation. 1. Gradient-Intercept Form 2. General Form y = mx +b Gradienty-Intercept ax +by + c = 0 ‘a’ always positive. ‘b’ NOT y-intercept Always ‘0’ We must be able to convert between forms.

22
Co-ordinate Geometry 22 10.5 Linear Equations (1/6) Write in General Form a) y = 2x + 3 -y-y 0 = 2x – y + 3 2x –y +3 = 0 b) 2y = x +7 -2y -2y 0 = x – 2y +7 x – 2y +7 = 0 c) y = -x + 6 +x -6 x + y - 6 = 0 d) y = +3 x3 x3 x3 x3 3y = x + 9 -3y -3y 0 = x -3y + 9 x -3y + 9 = 0

23
Co-ordinate Geometry 23 10.5 Linear Equations (2/6) Write in Gradient-Intercept Form a) 3y = 9x + 6 ÷3÷3÷3 y = 3x + 2 b) 5y = 2x + 1 ÷5÷5÷5 y = x + 2515 c) y - 2x = 0 +2x+2x y = 2x d) 3y + x -1 = 0 -x -x+1 +1 3y = -x +1 y = x + 313 ÷3 ÷3 ÷3

24
Co-ordinate Geometry 24 10.5 Linear Equations (3/6) Write the Gradient and Y-Intercept a) y = 9x + 6 b) y = x - 1 c) y = 2x d) y = x + 7 12 m = 9 b = 6 m = b = -1 12 m = 2 b = 0 m = 1 b = 7

25
Co-ordinate Geometry 25 10.5 Linear Equations (4/6) Write the equation. y = mx + b a) m=2 b=1 b) m= b=-5 c) m=-4 b=-1 d) m=12 b=7 23 y = 2x + 1 y = x - 5 23 y = -4x - 1 y = 12x + 7

26
Co-ordinate Geometry 26 y = x + 10.5 Linear Equations (5/6) Write the equation as y=mx+b and state m and b. a) y – 2x = 1 b) 2y = 3x + 7 32 +2x+2x y = 2x + 1 m = 2 b = 1 ÷2÷2÷2 72 m = b = 32 72

27
Co-ordinate Geometry 27 10.5 Linear Equations (6/6) Is the point given on the line? a) y = 2x + 1 (2,5) b) 2y = 3x + 7 (1,4) c) y – 2x = 1 (1,3) d) y = 5x + 1 (1,5) 5 = 2x2 + 1 5 = 5 Yes 24 = 31 + 7 2x4 = 3x1 + 7 8 = 10 No 3 - 2x1 = 1 1 = 1 Yes 5 = 5x1 + 1 5 = 6 No

28
Co-ordinate Geometry 28 10.6 Parallel Lines (1/5) Are two lines parallel? Do they have the same gradient? m 1 = m 2 y = mx + b To find out if two lines are parallel put in the form y = mx + b Check to see if coefficients of x are equal. GeoGebra

29
Co-ordinate Geometry 29 10.6 Parallel Lines (2/5) Are the two lines parallel? 10x + 2y - 7 = 0 5x + y - 3 = 0 2y - 7 = -10x 2y = -10x + 7 y = -5x + 3.5 y - 3 = -5x y = -5x + 3 m 1 = -5 m 2 = -5 They are parallel !

30
Co-ordinate Geometry 30 10.6 Parallel Lines (3/5) Are the two lines parallel? 6x + 2y - 3 = 0 3x + y - 3 = 0 2y - 3 = -6x 2y = -6x + 3 y = -2x + 1.5 y - 3 = -3x y = -3x + 3 m 1 = -2 m 2 = -3 They are NOT parallel !

31
Co-ordinate Geometry 31 10.6 Parallel Lines (4/5) Are the interval and line parallel? (2,3) to (5,9) 4x + 2y - 6 = 0 m = y 2 – y 1 x 2 - x 1 = 2y - 6 = -4x y = -2x + 1.5 m1 = 2m1 = 2m1 = 2m1 = 2 m 2 = -2 They are NOT parallel ! 4y = -8x + 6 9 – 3 5 - 2

32
Co-ordinate Geometry 32 10.6 Parallel Lines (5/5) Are the interval and line parallel? (2,9) to (5,3) 6x + 3y - 5 = 0 m = y 2 – y 1 x 2 -x 1 = 3y - 5 = -6x y = -2x + 1.25 m 1 = -2 m 2 = -2 They are parallel ! 4y = -8x + 5 3 – 9 5 - 2

Similar presentations

Presentation is loading. Please wait....

OK

Time for a BREAK! You have 45 Minutes.

Time for a BREAK! You have 45 Minutes.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on computer science projects Ppt on model view controller design Ppt on spiritual leadership qualities Ppt on industrial employment standing order act 1946 Ppt on voluntary provident fund Ppt on principles of peace building Ppt on vehicle tracking system with gps and gsm Ppt on earth hour chicago Ppt on waxes structure Ppt on various types of web browsers and their features