The vertical angle is an isosceles traingle is 80degree. Find measurment of its base angles.
The vertical angle is an isosceles traingle is 80degree. Find measurment of its base angles.
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Let ΔABC be an isosceles triangle with vertical angle ∠A=80∘
and AB=AC.
Then,
AB=AC⇒∠B=∠C
But, ∠A+∠B+∠C=180 ∘
∴80∘
+2∠B=180 ∘
⇒∠B=40 ∘
Answered By=shreyash. .......
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