Drag an answer to each box to complete this paragraph proof.
Given: Triangle PQR with mā P=(x)° , mā Q=(3x)° , and mā R=(5x)° .
Prove: x = 20
By the triangle sum theorem, the sum of the angles in a triangle is equal to 180°. Therefore using the given and triangle sum theorem, mā P+mā Q+mā R=180° . Using the substitution property,
