The figure shows a rectangle ABCD. ∠ADE = 60° and ∠BDC = 41°. Find
- ∠BDE
- ∠ABD
(a)
∠BDE
= 60° + 41° - 90°
= 11° (Overlapping angles)
(b)
∠ADB
= 60° - 11°
= 49° (Overlapping angles)
∠ABD
= 180° - 90° - 49°
= 41° (Angles sum of triangle)
Answer(s): (a) 11°; (b) 41°