To calculate angles on a straight line Year
- Slides: 9
To calculate angles on a straight line. Year 5 - Shape (WTS) Lesson 2
LI: To calculate angles on a straight line. I know angles on a straight line add up 180 0. I can add up the angles on the straight line. I can subtract my sum by 180 to find the missing angle. Vocabulary Angles Obtuse Acute Right angle Degrees Calculate Straight line 180 Add Subtract Recap from the last lesson… Look at the skills and then quickly check your understanding. Previously, we looked at how we can estimate the size and type of angle. Let’s quickly recap the rules of how to estimate the size and type of an angle. - We always measure angles using degrees (0) which allows us to tell how much space there is between two lines. The most common type of angle is the right angle which is measured at exactly 900. The smallest type of angle is known as the acute angle. They can measure from 1 0 to 890. Obtuse angles are larger than right angles but can only go up to 180 0
Learning check: You do…. Answers: a) Reflex angle b) Obtuse angle (straight line) c) Acute angle) d) Obtuse angle QUESTIONS: Estimate the size and type of angles: If you are struggling or didn’t get the correct answers, rewatch the video above which breaks down how to estimate angles. If you feel confident, carry on with the slides.
LI: To calculate angles on a straight line. I know angles on a straight line add up 180 0. I can add up the angles on the straight line. I can subtract my sum by 180 to find the missing angle. Vocabulary Angles Obtuse Acute Right angle Degrees Calculate Straight line 180 Add Subtract Calculate the size of the missing angles: Teacher Example… Fluency - calculating angles on a straight line and a point.
LI: To calculate angles on a straight line. I know angles on a straight line add up 180 0. I can add up the angles on the straight line. I can subtract my sum by 180 to find the missing angle. Learning check: You do…. Calculate the size of the missing angles: Vocabulary Angles Obtuse Acute Right angle Degrees Calculate Straight line 180 Add Subtract Answers: 1. 560 2. 1050
LI: To calculate angles on a straight line. I know angles on a straight line add up 180 0. I can add up the angles on the straight line. I can subtract my sum by 180 to find the missing angle. Vocabulary Angles Obtuse Acute Right angle Degrees Calculate Straight line 180 Add Subtract Application question: Calculate the angle y. Reasoning question: Jamie argues that angle x is a right angle. Is he correct? Explain your answer. Teacher Example… Application and reasoning questions. . . Watch the video to see how we can solve this problem.
LI: To calculate angles on a straight line. I know angles on a straight line add up 180 0. I can add up the angles on the straight line. I can subtract my sum by 180 to find the missing angle. Q 1 An angle is drawn at 340. The angle is then expanded by two right angles. What is the size of the angle now? Q 2 Sammy thinks angle p is larger than angle g. Is he correct? Explain your answer. Vocabulary Angles Obtuse Acute Right angle Degrees Calculate Straight line 180 Add Subtract Learning check: You do….
LI: To calculate angles on a straight line. I know angles on a straight line add up 180 0. I can add up the angles on the straight line. I can subtract my sum by 180 to find the missing angle. Q 1 An angle is drawn at 340. The angle is then expanded by two right angles. What is the size of the angle now? 340 + 900 = 2140 Q 2 Sammy thinks angle p is larger than angle g. Is he correct? Explain your answer. Sammy is correct because 50 + 90 = 190 360 - 190 = 170 therefore p = 170 g = 60 + 50 = 110 180 - 110 = 70. Vocabulary Angles Obtuse Acute Right angle Degrees Calculate Straight line 180 Add Subtract Learning check: Answers:
Well done! Now complete the worksheet below on the google doc. You can either write the answers on the google doc, or write it out on paper and send a picture of your work to your teacher. https: //docs. google. com/document/d/1 AMSzll. Ff. Yi 9 pxmv. Smr. Haz 1 u_lm_J 14 a. MQ 5 lvsb_TJj. M/edit Remember to log onto maths whizz as well this week!