TUVW and NPQV are rhombuses. Find ∠NSU.
∠NUW
= (180° - 120°) ÷ 2
= 30° (Isosceles triangle)
∠QPR
= 180° - 90° - 15°
= 75° (Angles sum of triangle)
∠VNU = ∠QPR
= 75° (Corresponding angles)
∠NSU
= 180° - 75° - 30°
= 75° (Angles sum of triangle)
Answer(s): 75°