Question

In △PQR, if the measures of ∠Q and ∠R are 100° and 45°respectively, find the measure of ∠P

Answer 1

∠ P = 35°

Explanation:

the sum of the 3 angles in a triangle = 180° , then

∠ P + ∠ Q ∠ R = 180° ( substitute given values )

∠ P + 100° + 45° = 180° , that is

∠ P + 145° = 180° ( subtract 145° from both sides )

∠ P = 180° - 145° = 35°