Question

How to solve this? answer with full explanation ​

Answer 1

Answer:

90°

Step-by-step explanation:

since the sum of the interior angle of any triangle adds up to 180°and aldo the base angles of an isoseles triangle are equal we may let the base angle be X then the vertex angle is 2x

therefore,x+x+2x=180°

x=45°

therefore the vertex angle is 90°

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