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protractor

Adjacent and Opposite Angles. protractor. 180ᴼ. Measurement and Geometry 66. Adjacent and Opposite Angles. Straight Angle, Straight Line = 180ᴼ. 180ᴼ. 40ᴼ. Measurement and Geometry 66. Adjacent and Opposite Angles. Straight Angle, Straight Line = 180ᴼ. 180ᴼ. 180ᴼ - 40ᴼ = 140 ᴼ.

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protractor

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  1. Adjacent and Opposite Angles protractor 180ᴼ Measurement and Geometry 66

  2. Adjacent and Opposite Angles Straight Angle, Straight Line = 180ᴼ 180ᴼ 40ᴼ Measurement and Geometry 66

  3. Adjacent and Opposite Angles Straight Angle, Straight Line = 180ᴼ 180ᴼ 180ᴼ - 40ᴼ = 140ᴼ 40ᴼ 40ᴼ Measurement and Geometry 66

  4. Adjacent and Opposite Angles Right Angle = 90ᴼ 90ᴼ 90ᴼ - 40ᴼ = 50ᴼ 40ᴼ 40ᴼ Measurement and Geometry 66

  5. Adjacent and Opposite Angles Revolution = 360ᴼ 360ᴼ 140ᴼ 360ᴼ - 140ᴼ = 220ᴼ 140ᴼ 40ᴼ 180ᴼ 40ᴼ 140ᴼ Measurement and Geometry 66

  6. Adjacent and Opposite Angles • Is your angle a straight angle, a right angle or a revolution? • How could we draw a line to create angles at a point? • How could we measure one angle? • How could we calculate the size of the other angle? • What is the size of the other angle? • How could we measure the angle to check? • How could we record this? • My angle is a straight angle or a right angle or a revolution • I have drawn a line to create angles at a point • I measured one angle as … • I subtracted the size of this angle from 180ᴼ / 90ᴼ / 360ᴼ • The size of the other angle is … • I measured the angle to check • I recorded this as … Measurement and Geometry 66

  7. Adjacent and Opposite Angles vertically opposite angles vertexally opposite angles vertex Measurement and Geometry 66

  8. Adjacent and Opposite Angles 50ᴼ 50ᴼ Measurement and Geometry 66

  9. Adjacent and Opposite Angles 130ᴼ 50ᴼ 50ᴼ 50ᴼ 50ᴼ • Angles on a straight line 130ᴼ 50ᴼ 50ᴼ 130ᴼ • Angles in a revolution Measurement and Geometry 66

  10. Adjacent and Opposite Angles 130ᴼ 50ᴼ 50ᴼ 50ᴼ 50ᴼ • Angles on a straight line 130ᴼ 50ᴼ 50ᴼ 130ᴼ • Angles in a revolution Measurement and Geometry 66

  11. Adjacent and Opposite Angles • How could we construct vertically opposite angles? • How could we use a protractor to measure one of the angles? • How could we calculate the size of the vertically opposite angle? • How could we work out the size of the adjacent angles? • How could we record this? • I constructed vertically opposite angles by drawing two intersecting lines • I used a protractor to measure one of the angles. • I worked out the size of the vertically opposite angle by … • I measured the vertically opposite angle … • I worked out the size of the adjacent angles because I knew the angles in a straight line total 180 degrees and angles in a revolution equal 360 degrees • I recorded this is … Measurement and Geometry 66

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