1. Objective: SWBAT find missing angles that are supplementary or around a point.

2. Vocabulary Supplementary Angles2 or more angles whose sum equals 180°

3. Supplementary Angles Angles at a point on a straight line add up to 180°. Calculate these supplementary angles. 1. 2. x = ________ b = ________ 180 - 130 50 180 - 40 140 50° 140°

4. Angles Around a Point Angles around a point add up to 360°. Work out the size of the unknown angle in each of these questions. 1. 2. 3. c = _______ f = ________ h =______ 220 + 85 305 360 - 305 55 55° 115 62 + 58 235 360 - 235 125 360 - 60 300 300 ÷ 2 =150 125° 150°