Question

in an isosceles triangle, the vertex angle is twice the each base angle.find the vertex angle .​

Answer 1

Answer:

90 degree

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Step-by-step explanation:

Since the sum of the interior angles of any triangle adds up to 180 and also the base angles of an isosceles triangle are equal,we may let the base angles be x

, then the vertex angle is 2x.

∴ x+x+2x=180∘ .

∴x=45∘

.

Therefore the vertex angle is

• 90∘