Which lines are perpendicular?
A) A and B
B) A and C
C) B and C
D) A and D

Asphere has a diameter of 10 in. what is the volume of the sphere?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Right triangle xyz has a right angle at vertex y and a hypotenuse that measures 24 cm. angle zxy measures 70º. what is the length of line segment xy? round to the nearest tenth. 8.2 cm 8.7 cm 22.6 m 25.5 cm