Given that QRST is a trapezium and QRT is an isosceles triangle, find the values of
- ∠d
- ∠e
(a)
∠d
= 180° - 83°
= 97° (Interior angles)
(b)
∠TRQ
= 83° ÷ 2
= 41.5° (Exterior angle of a triangle)
∠STR = ∠TRQ = 41.5° (Alternate angles)
∠e
= 180° - 90° - 41.5°
= 48.5° (Angles sum of triangle)
Answer(s): (a) 97°; (b) 48.5°