Question

What is the mean of all the internal angles of a triangle.

a. 40° b. 70°

c. 50° d. 60°

explain with proper steps

Answer 1

Let x,y, z be the 3 internal angles of a triangle.
So by angle sum property,
x+y+z= 180°
Now mean of internal angles of triangle ---
x+y+z / 3
=> 180 / 3 ( as x+ y+ z = 180°)
= 60°
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So d. 60° is the right answer.
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