# 18-Dec-14Created by Mr.Lafferty Math Dept Revising Basic Angles Naming Angles www.mathsrevision.com Calculating Missing angles Angles in a Triangle Corresponding.

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

18-Dec-14Created by Mr.Lafferty Math Dept Starter Questions Q3.Calculate 2.34 + 4.7 + 0.12 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 1000. (a)12,501(b)369,765 www.mathsrevision.com

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. www.mathsrevision.com Type of Angles MTH 3-17a

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 www.mathsrevision.com Straight Line Angle exactly 180 o Type of Angles MTH 3-17a Horizontal Vertical

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

18-Dec-14Created by Mr.Lafferty Math Dept Starter Questions www.mathsrevision.com 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

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. www.mathsrevision.com Naming Angles MTH 3-17a

18-Dec-14Created by Mr.Lafferty Math Dept Naming Angles www.mathsrevision.com 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

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

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

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. www.mathsrevision.com Find Missing Angles MTH 3-17a

18-Dec-14Created by Mr.Lafferty Math Dept 120 o 95 o Find Missing Angle www.mathsrevision.com 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

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

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

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. www.mathsrevision.com MTH 3-17a

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

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 www.mathsrevision.com MTH 3-17a Demo

18-Dec-14Created by Mr.Lafferty Math Dept Sum of Angles in a Triangle www.mathsrevision.com 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

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

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 www.mathsrevision.com

18-Dec-14Created by Mr.Lafferty Math Dept www.mathsrevision.com 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

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

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

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

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

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

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

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

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

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

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

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

18-Dec-14Created by Mr.Lafferty Math Dept 115 65 115 65 What are the values of the missing angles? www.mathsrevision.com Angles Corresponding Angles MTH 3-17a

18-Dec-14Created by Mr.Lafferty Math Dept 57 123 57 123 What are the values of the missing angles? www.mathsrevision.com Angles Corresponding Angles MTH 3-17a

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

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

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 www.mathsrevision.com MTH 3-17a

18-Dec-14Created by Mr.Lafferty Math Dept www.mathsrevision.com 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

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

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

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

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

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

18-Dec-14Created by Mr.Lafferty Math Dept 50 ab13050 www.mathsrevision.com Angles Alternate Angles Find the value a and b ? MTH 3-17a

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

120 18-Dec-14Created by Mr.Lafferty Math Dept 60 a b c120 60 www.mathsrevision.com Angles Alternate Angles Find the value a, b and c ? MTH 3-17a

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

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