Consequently, if the opposite side of an angle is longer than its adjacent side, the angle will be greater than 45^(∘), and vice-versa. Let's identify the opposite and adjacent side to x in our diagram.
Since the opposite side of x is less than the adjacent side, the measure of x must be less than 45^(∘).
b The triangle's legs are congruent, which means this is an isosceles triangle. Therefore, both non-right angles — which includes x — are 45^(∘).
c Like in Part A, we have to identify the opposite and adjacent side of the angle.
Since the opposite side is longer than the adjacent side, x must be greater than 45^(∘).
