Mar
Sun
14
missing angle = 180 - (70 + 70)
= 180 - 140
=40 degrees.
The third angle degree = 180 - 70 - 70 = 40 degrees :)
*Sum of interior angles of a triangle = 180 degree.
Let the third angle be n.
Thus (n+70+70) degree = 180 degree.
n+140=180 => n = 180-140 = 40 degree.
If you want to find out the sum of interior angles of any polygon, then
use (n-20)180 degree, where n = no. of sides of polygon.
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