Find the angle θ between u and v if u = <–9, –8 , 9> and v = <–5, –3, 9>.

47.1
158.5
68.5
21.5

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°