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18-Dec-14Created by Mr.Lafferty Math Dept Revising Basic Angles Naming Angles Calculating Missing angles Angles in a Triangle Corresponding Angles Alternate Angles Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Starter Questions Q3.Calculate Q1.Convert to the 24 hour clock. (a)7:25 pm (b)6:50 am Q2.Write down the type of angle that is less than 90 deg. Q4.Round the following to nearest (a)12,501(b)369,765

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18-Dec-14Created by Mr.Lafferty Math Dept Learning Intention Success Criteria 1.To be able to identify acute, right-angle, obtuse, straight line and reflex angles. 1.To revise Type of Angles from Level 2. Type of Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Acute less than 90 o Obtuse Between 90 o – 180 o Right Angle exactly 90 o reflex over 180 o less than 360 o Straight Line Angle exactly 180 o Type of Angles MTH 3-17a Horizontal Vertical

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18-Dec-14Created by Mr.Lafferty Math Dept Now try Ch12 (page 146) Exercise 1 Type of Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Starter Questions Q3.Calculate 5.65 – 1.3 Q1.Convert to the 12 hour clock. (a)17:15 (b)05:40 Q2.Write down 2 numbers that add to give 8 and multiply to give 15. Q4.Round the following to nearest 100. (a)13,551(b)369,449 MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Learning Intention Success Criteria 1.Remember how to name an angle. 1.We are learning how we name angles by THREE capital letters with the angle sign. 2.Understand the difference between the type of angle and the name of an angle. Naming Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Naming Angles A B C Type of angle is acute Name of angle is ∠ ABC Type of angle is obtuse Name of angle is ∠ ZYX X Y Z MIDDLE LETTER IS ALWAYS WHERE THE ANGLE IS ALWAYS 3 CAPITAL LETTERS MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Now try Ch12 (page 147) Exercise 2 Naming Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Starter Questions MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Learning Intention Success Criteria 1.Remember 360 o in a circle. 1.We are learning to calculate a missing angle. 2.Find missing angle given all other angles. Find Missing Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept 120 o 95 o Find Missing Angle Angles round a point always add up to 360 o 65 o Two angles making a straight line add up to 180 o (Supplementary angles) Angles opposite each other at a cross are equal. 34 o 115 o 146 o 146 o 145 o 35 o Two angles making a right angle add up to 90 o (Complementary angles) 55 o MTH 3-17a Demo

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18-Dec-14Created by Mr.Lafferty Math Dept Now try Ch12 (page 149) Exercise 3 Find Missing Angle

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18-Dec-14Created by Mr.Lafferty Math Dept Starter Questions 75 o xoxo

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18-Dec-14Created by Mr.Lafferty Math Dept Sum of Angles in a Triangle Learning Intention Success Criteria 1.Remember all angles in a triangle add to 180 o. 1.We are learning that all the angles in a triangle sum to 180 o. 2.Apply knowledge to solve problems. MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept To determine the angle sum of any Triangle Cut off corners MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Sum of angles in ANY Triangle All angles in a triangle ALWAYS added up to180 o 180 o MTH 3-17a Demo

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18-Dec-14Created by Mr.Lafferty Math Dept Sum of Angles in a Triangle Copy out the following triangles and find the missing angles. 32 o 50 o 38 o 87 o xoxo xoxo xoxo xoxo Remember all the angles add up to 180 o MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Now try Ch12 (page 151) Exercise 4 starter at Q3 Sum of Angles in a Triangle MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Starter Questions Q1.Solve the equation below Q2.Find two numbers that multiply to give 18 and subtract to give 3. Q3.Find the average and range of the numbers below Q4.Find 2,8,8,10

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18-Dec-14Created by Mr.Lafferty Math Dept Learning Intention Success Criteria 1.To understand the term corresponding angles. 1 We are learning the term corresponding angles. 2. To be able to apply property to solve problems. Angles Corresponding Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Look for F shapes Angles Alternate Angles = equal angles MTH 3-17a Demo

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18-Dec-14Created by Mr.Lafferty Math Dept Angles Corresponding Angles Which angles are equal? MTH 3-17a DEMO

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18-Dec-14Created by Mr.Lafferty Math Dept Angles Corresponding Angles Which angles are equal? MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Angles Corresponding Angles Which angles are equal to the shaded angle? MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Angles Which angles are equal to the shaded angle? MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept look for shapes Angles Corresponding Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept 120 x Angles What is the value of letter x? Corresponding Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept 100 a Angles What is the value of letter a? Corresponding Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept 48 b Angles What is the value of letter b? Corresponding Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept 110 c Angles What is the value of letter c? Corresponding Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept 70 a b 110 What are the values of letters a and b? Angles Corresponding Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept What are the values of the missing angles? Angles Corresponding Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept What are the values of the missing angles? Angles Corresponding Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept What are the values of the missing angles? Angles Corresponding Angles 115 o 140 o 65 o 115 o 40 o 140 o 75 o MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Now try Exercise 5 Ch12 (page 154) Angles Corresponding Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Starter Questions Q1.Solve the equation below Q2.Find two numbers that multiply to give 48 and divide to give 3. Q3.Find missing angles 119 o aoao bobo MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Learning Intention Success Criteria 1.To understand the term alternate angles. 1. We are learning the term alternate angles. 2. To be able to apply property to solve problems. Angles Alternate Angles MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Look for - Z shapes Angles Alternate Angles = equal angles MTH 3-17a Demo

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18-Dec-14Created by Mr.Lafferty Math Dept 35 a Angles Alternate Angles Find the value of a ? MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept b 43 Angles Alternate Angles Find the value of b ? MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept 33 c Angles Alternate Angles Find the value of c ? MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept 123 d Angles Alternate Angles Find the value of d ? MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept 50 ab Angles Alternate Angles Find the value a and b ? MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept 135 c 45 d Angles Alternate Angles Find the value of c and d ? MTH 3-17a

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Dec-14Created by Mr.Lafferty Math Dept 60 a b c Angles Alternate Angles Find the value a, b and c ? MTH 3-17a

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18-Dec-14Created by Mr.Lafferty Math Dept Now try Exercise 6 Ch12 (page 157) Angles Alternate Angles MTH 3-17a

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