1. a. Supplementary angles are angles that add up to give 180°
b. Reflex angle is an angle that is more than 180 but less than 360°
c. Similar shapes are shapes with equal corresponding angles and equal proportion of corresponding sides are equal
d. The sum of angles in a quadrilateral is 360°
2. The value of a is 135° ( angles at a point.)
Supplementary angles are angles that sum up to give 180°. Examples include 40 and 140, 50 and 130°.
1. 1. a. Supplementary angles are angles that add up to give 180°
b. Reflex angle is an angle that is more than 180 but less than 360°
c. Similar shapes are shapes with equal corresponding angles and equal proportion of corresponding sides are equal
d. The sum of angles in a quadrilateral is 360°
2. a + 140 + 85 = 360° ( angle at a point)
a = 360 - 225
a = 135°