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Question
In the quadrilateral ABCD, AB = BC and AD = DC Measure of ∠BCD is
Options
150°
30°
105°
72°
Solution
105°
Explanation;
Hint:
Join BD
∠DBC = 54°; ∠BDC = 21°
∴ ∠BCD = 180° – (54° + 21°)
= 180° – 75°
= 105°
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