Question

show that angles of an equilateral triangle are 60 degree each 9 standard test book mathematics exercise 5.2​

Answer 1

Answer:

Sum of interior angle of a triangle = 180°

So..... Triangle have three angles....

➡️ ➡️ 180 / 3 = 60°

➡️ 60°

Or.......

Sum of interior angle of a triangle = 180°

Let the angles be X....

➡️ x +x + x = 180

3x. =. 180

X = 180/3 = 60°

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Answer 2

Answer:

as we know

sides of equilateral are equal

so, by theoram angle opposite to equal side are equal

then

let the angles be -x

by angle sum property

x+x+x-180

3x-180

x-180/3

x-60