In isosceles triangle RST below, what is the value of yTriangle R S T. Angle T is 38 degrees and angles R and S are y.38 degrees71 degrees122 degrees142 degrees?

Answer 1

Since it is an Isosceles Triangle and T = 38

Then subtract 38 from 180 , which 142 .

142 is the total of the two equal angles R & S . So divide 142 by 2 = 71

So angles R(y) & S (y) are both 71 degrees.

Remember with an Isosceles Triangle, not only are two sides of equal length , but two angles are of equal size.