Suppose P is , Q is

MATHEMATICS · Multi-part · AP · AP Precalculus · Functions with Parameters, Vectors, and Matrices · Functions with Parameters, Vectors, and Matrices

Problem

Suppose P is

(-5, 0, 1)

, Q is

(-2, -2, 2)

, and R is

(-1, 5, -1)

. (a) Show that triangle PQR is right angled. (b) Find the measure of

\widehat{PQR}