In ΔABC, the bisectors of ∠B and ∠C intersect each other at a point D. If ∠BDC = 107°, then the measure of ∠A is:
Show answer & explanation
Correct answer: D
Explanation
Correct Answer is option 4 i.e. 34°
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Understanding |
Application |
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Given that the bisectors of ∠B and ∠C intersect each other at a point D. ∠BDC = 107°
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Hence, 90° + ∠A/2 = 107° ⇒ ∠A/2 = 17° ∴ ∠A = 34° |