Which best describes this quadrilateral? a. all angles have the same measure. b. opposite sides are parallel. c. only one pair of sides is parallel. d. all sides are the same length.

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°