Please help me I would really appreciate it.

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm

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°

Two numbers have a sum of -19. one number is x. what expression represents the other number?