In the figure, STUV is a parallelogram and WU = WV.
- Find ∠x.
- Find ∠y.
(a)
∠SWT = ∠STW (Isosceles triangle)
∠x
= 180° - 45° - 45° - 69°
= 21° (Interior angles)
(b)
∠SWT
= 180° - 45° - 45°
= 90° (Angles sum of triangle)
∠y
= 360° - 90°
= 270° (Angles at a point)
Answer(s): (a) 21°; (b) 270°