In the figure, STUV is a parallelogram and WU = WV.
- Find ∠x.
- Find ∠y.
(a)
∠SWT = ∠STW (Isosceles triangle)
∠x
= 180° - 40° - 40° - 71°
= 29° (Interior angles)
(b)
∠SWT
= 180° - 40° - 40°
= 100° (Angles sum of triangle)
∠y
= 360° - 100°
= 260° (Angles at a point)
Answer(s): (a) 29°; (b) 260°