One of the equal angles of an isosceles triangle is 40 degrees. What is thi angle opposite the unequal side?

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In an isosceles triangle, two of the sides are equal. This means that the angles opposite them are equal, too. If one is 40 degrees, then so is the other. To find the angle opposite the unequal side, begin by adding the equal angles. 40+40=80 degrees To find the third angle, subtract this amount from 180 (the number of degrees in any triangle) 180 -80=100 degrees (third angle)

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