In the figure, NPQR is a parallelogram and SQ = SR.
- Find ∠t.
- Find ∠u.
(a)
∠NSP = ∠NPS (Isosceles triangle)
∠t
= 180° - 48° - 48° - 69°
= 15° (Interior angles)
(b)
∠NSP
= 180° - 48° - 48°
= 84° (Angles sum of triangle)
∠u
= 360° - 84°
= 276° (Angles at a point)
Answer(s): (a) 15°; (b) 276°