Question

give me very fast solution

Answer 1

IN A EQUILATERAL TRIANGLE

AB = BC

BC=CA

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AB=BC=CA

<A=<B=<C

We know that sum of angles of a triangle is 180 degree

<A+<b+<C = 180 DEGREE

<a+<a+<a = 180 (<a=<b=<C)

3<A = 180

<a = 60 DEGREE

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<A=<B<C= 60 DEGREE proved

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Answer 2

Here is your answer...