In the figure, NPQR is a parallelogram and SQ = SR.
- Find ∠t.
- Find ∠u.
(a)
∠NSP = ∠NPS (Isosceles triangle)
∠t
= 180° - 39° - 39° - 69°
= 33° (Interior angles)
(b)
∠NSP
= 180° - 39° - 39°
= 102° (Angles sum of triangle)
∠u
= 360° - 102°
= 258° (Angles at a point)
Answer(s): (a) 33°; (b) 258°