PQRS is a rectangular piece of paper. Corners R and S are folded upwards as shown. ∠RUV = 18° and ∠SUE = 12 °
- Find ∠RVU
- Find ∠SUR
(a)
∠RVU
= 180° - 90° - 18°
= 72° (Angles sum of triangle)
(b)
∠SUR
= 180° - 12° - 12° - 18° - 18°
= 120° (Angles on a straight line)
Answer(s): (a) 72° (b) 120°