The figure shows a square CDGH and a rectangle DEFG. ∠EHG = 39°.
- Find ∠DKH.
- Find ∠CJE.
(a)
∠DKH
= 39° + 90°
= 129° (Exterior angle of a triangle)
(b)
∠CGH = 45°
∠GJH
= 180° - 39° - 45°
= 96° (Angles sum of triangle)
∠CJE
= ∠GJH
= 96° (Vertically opposite angles)
Answer(s): (a) 129°; (b) 96°