Progression in Mastery Year 5 Angles Around a

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Progression in Mastery Year 5 Angles Around a Point Are you ready for the

Progression in Mastery Year 5 Angles Around a Point Are you ready for the challenge of angles around a point? ©Deepening Understanding LTD 2020

Let’s do this! What is the same? What is different? ©Deepening Understanding LTD 2020

Let’s do this! What is the same? What is different? ©Deepening Understanding LTD 2020

Let’s revisit what we should know… We measure angles using a protractor. Angles on

Let’s revisit what we should know… We measure angles using a protractor. Angles on a straight line add up to 180°. ©Deepening Understanding LTD 2020

Let’s talk What are the measurements of the missing angles? 55 b º ©Deepening

Let’s talk What are the measurements of the missing angles? 55 b º ©Deepening Understanding LTD 2020

Let’s learn If the angles on a straight line = 180º, what would the

Let’s learn If the angles on a straight line = 180º, what would the angles on two straight line equal? 45º 135º 45º ©Deepening Understanding LTD 2020

Let’s learn The angles on two straight lines = 360º 45º 135º 45º If

Let’s learn The angles on two straight lines = 360º 45º 135º 45º If we put the lines together, you can see that the angles around the point also equal 360° ©Deepening Understanding LTD 2020

Let’s learn 45º 135º 45º The angles ____ __ ____ equal _____°. We allsay

Let’s learn 45º 135º 45º The angles ____ __ ____ equal _____°. We allsay sayit!it! You I say it! ©Deepening Understanding LTD 2020

Let’s talk What is the measurement of angle a? a 330° Prove it! ©Deepening

Let’s talk What is the measurement of angle a? a 330° Prove it! ©Deepening Understanding LTD 2020

Let’s talk What is the measurement of angle a? a 330° Angles around a

Let’s talk What is the measurement of angle a? a 330° Angles around a point = 360° 360 – 330 = 30 Angle a = 30° ©Deepening Understanding LTD 2020

Let’s develop our learning We can use our learning to find more than one

Let’s develop our learning We can use our learning to find more than one missing angle. a 58° b 44° 110° Calculate the angles on the straight lines first. 44 + 58 = 102 180 – 102 = 78 angle a = 78° 180 – 120 = 60 angle b = 60° ©Deepening Understanding LTD 2020

Let’s talk Calculate the missing angles. 52° a b 76° ©Deepening Understanding LTD 2020

Let’s talk Calculate the missing angles. 52° a b 76° ©Deepening Understanding LTD 2020

Independent Task Let’s showcase our learning ©Deepening Understanding LTD 2020

Independent Task Let’s showcase our learning ©Deepening Understanding LTD 2020

Exit task – Dong Nao Jin This image is made of regular shapes. Calculate

Exit task – Dong Nao Jin This image is made of regular shapes. Calculate angle x. x x ©Deepening Understanding LTD 2020