In the figure, ∠RTS = 90°. ∠RTU is 30° more than ∠STU.
- What line is perpendicular to RT?
- Find ∠RTU.
(a)
Line ST or TS is perpendicular to RT.
(b)
∠STU = 1 u
∠RTU = 1 u + 30
1 u + 1 u + 30° = 90° (Right angle)
2 u = 90° - 30° = 60°
1 u = 60° ÷ 2 = 30°
∠RTU
= 30° + 30°
= 60°
Answer(s): (a) ST or TS; (b) 60°