In the figure, STUV is a parallelogram and WU = WV.
- Find ∠x.
- Find ∠y.
(a)
∠SWT = ∠STW (Isosceles triangle)
∠x
= 180° - 49° - 49° - 72°
= 10° (Interior angles)
(b)
∠SWT
= 180° - 49° - 49°
= 82° (Angles sum of triangle)
∠y
= 360° - 82°
= 278° (Angles at a point)
Answer(s): (a) 10°; (b) 278°