Answer:
Explanation:
See attached
Given
Kite WXYZ with:
- XY = 3a - 5
- YZ = a + 11
- ∠W = 50°
- ∠X = 3b
- ∠Y = 70°
To find
Solution
Since XY and YZ are congruent sides, XY = YZ
- 3a - 5 = a + 11
- 3a - a = 11 + 5
- 2a = 16
- a = 8
The angles Z and X are equal and the sum of 4 angles is 360°, therefore:
- 3b + 3b + 50° + 70° = 360°
- 6b + 120° = 360°
- 6b = 240°
- b = 40°
Correct option is the last one