In an isosceles triangle, if vertex angle is equal to the sum of the base angles then the measure of vertex angle is; *
a. 50°
b. 45°
c. 90°
d. 100°
Answers
Answered by
4
Answer:
90°
This is the answer to this question
Answered by
8
Answer:
The correct answer is option B
45⁰
Since the sum of the interior angles of any triangle adds up to 180⁰ 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=180⁰.
∴ 2x + 2x=180⁰
∴ 4x = 180⁰
∴ x = 180⁰ ÷ 4
∴x=45⁰.
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