In the figure, NPQR is a parallelogram and SQ = SR.
- Find ∠t.
- Find ∠u.
(a)
∠NSP = ∠NPS (Isosceles triangle)
∠t
= 180° - 49° - 49° - 70°
= 12° (Interior angles)
(b)
∠NSP
= 180° - 49° - 49°
= 82° (Angles sum of triangle)
∠u
= 360° - 82°
= 278° (Angles at a point)
Answer(s): (a) 12°; (b) 278°