The figure shows a rectangle ABCD. ∠ADE = 59° and ∠BDC = 39°. Find
- ∠BDE
- ∠ABD
(a)
∠BDE
= 59° + 39° - 90°
= 8° (Overlapping angles)
(b)
∠ADB
= 59° - 8°
= 51° (Overlapping angles)
∠ABD
= 180° - 90° - 51°
= 39° (Angles sum of triangle)
Answer(s): (a) 8°; (b) 39°