In ΔABC, if AB = AC and ∠BAC = 400, then the measure of ∠B is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 70o.
| Understanding/Application |
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AB = AC Since the two sides of the triangle are equal it is an isosceles triangle. Angles opposite to the equal sides of the isosceles triangle are equal. ∠BAC = 400 |
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Acc. to the triangle sum property: x + x + 400 = 1800 ⇒ 2x = 1400 ⇒ x = 700 Hence, ∠B = 700 |