To solve complex problems by calculating angles at

To solve complex problems by calculating angles at a point and a straight line. Year 5 - Shape (GDS) Lesson 2

LI: To solve complex problems by calculating angles at a point and a straight line. I know angles on a straight line add up to 180 0 and 3600 at a point. I can add up the angles on a straight line then subtract by 1800 I can add up the angles at a point then subtract by 3600. Vocabulary Angles Obtuse Acute Reflex Right angle Degrees Calculate Straight line (180) Point (360) 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 actue angle. They can measure from 10 to 890. Obtuse angles are larger than right angles but can only go up to 1800 The largest angles are called reflex angles or external angles which can be between 18003600.

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 solve complex problems by calculating angles at a point and a straight line. I know angles on a straight line add up to 180 0 and 3600 at a point. I can add up the angles on a straight line then subtract by 1800 I can add up the angles at a point then subtract by 3600. Vocabulary Angles Obtuse Acute Reflex Right angle Degrees Calculate Straight line (180) Point (360) Add Subtract Calculate the size of the missing angles: Teacher Example… Fluency - calculating angles on a straight line and a point.

LI: To solve complex problems by calculating angles at a point and a straight line. I know angles on a straight line add up to 180 0 and 3600 at a point. I can add up the angles on a straight line then subtract by 1800 I can add up the angles at a point then subtract by 3600. Vocabulary Angles Obtuse Acute Reflex Right angle Degrees Calculate Straight line (180) Point (360) Add Subtract Calculate the size of the missing angles: Teacher Example… Fluency - calculating angles on a straight line and a point.

LI: To solve complex problems by calculating angles at a point and a straight line. I know angles on a straight line add up to 180 0 and 3600 at a point. I can add up the angles on a straight line then subtract by 1800 I can add up the angles at a point then subtract by 3600. Vocabulary Angles Obtuse Acute Reflex Right angle Degrees Calculate Straight line (180) Point (360) Add Subtract Learning check: You do…. Calculate the size of the missing angles: Answers: 1. 2. 3. 4. 750 1500 560 1050

LI: To solve complex problems by calculating angles at a point and a straight line. I know angles on a straight line add up to 180 0 and 3600 at a point. I can add up the angles on a straight line then subtract by 1800 I can add up the angles at a point then subtract by 3600. Vocabulary Angles Obtuse Acute Reflex Right angle Degrees Calculate Straight line (180) Point (360) 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 solve complex problems by calculating angles at a point and a straight line. I know angles on a straight line add up to 180 0 and 3600 at a point. I can add up the angles on a straight line then subtract by 1800 I can add up the angles at a point then subtract by 3600. Vocabulary Angles Obtuse Acute Reflex Right angle Degrees Calculate Straight line (180) Point (360) Add Subtract Application question: The starting time on a clock is 12 O’clock. What time would it be the if the big hand had moved 3 right angles? Reasoning question: The following diagram shows the external angle. Jamie argues that the internal angle must be 450. Do you agree? Explain your answer. Teacher Example… Application and reasoning questions. . . Watch the video to see how we can solve this problem.

LI: To solve complex problems by calculating angles at a point and a straight line. I know angles on a straight line add up to 180 0 and 3600 at a point. I can add up the angles on a straight line then subtract by 1800 I can add up the angles at a point then subtract by 3600. Vocabulary Angles Obtuse Acute Reflex Right angle Degrees Calculate Straight line (180) Point (360) Add Subtract Learning check: You do…. 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.

LI: To solve complex problems by calculating angles at a point and a straight line. I know angles on a straight line add up to 180 0 and 3600 at a point. I can add up the angles on a straight line then subtract by 1800 I can add up the angles at a point then subtract by 3600. Vocabulary Angles Obtuse Acute Reflex Right angle Degrees Calculate Straight line (180) Point (360) Add Subtract Learning check: Answers: 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.

LI: To solve complex problems by calculating angles at a point and a straight line. I know angles on a straight line add up to 180 0 and 3600 at a point. I can add up the angles on a straight line then subtract by 1800 I can add up the angles at a point then subtract by 3600. Vocabulary Angles Obtuse Acute Reflex Right angle Degrees Calculate Straight line (180) Point (360) Add Subtract Learning check: You do…. Q 1 The hands on a clock are 900 apart. What time would it be if the hands were 300 apart? Q 2 Sammy thinks angle p is a right angle. Is he correct? Explain your answer.

LI: To solve complex problems by calculating angles at a point and a straight line. I know angles on a straight line add up to 180 0 and 3600 at a point. I can add up the angles on a straight line then subtract by 1800 I can add up the angles at a point then subtract by 3600. Vocabulary Angles Obtuse Acute Reflex Right angle Degrees Calculate Straight line (180) Point (360) Add Subtract Learning check: You do…. Q 1 The hands on a clock are 900 apart. What time would it be if the hands were 300 apart? 360 divided by 12 = 300 1 O’clock Q 2 Sammy thinks angle p is a right angle. Is he correct? Explain your answer. He is incorrect. 50 + 90 = 190 360 - 190 = 1700

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 y. Sc 4 Qj. MU 8_04 d. NScgp. Kmw. Mw_8 ug. Ne. GW 2 XTHL 0 Eu. ERBE/edit Remember to log onto maths whizz as well this week!