P is any point inside the rectangle ABCD. If PA = 27 cm, PB = 21 cm, PC = 6 cm, then the length PD (in cm) is equal to:
A15
B10
C12
D18
A15
B10
C12
D18
Related Questions:
ABC is a right triangle AR=4 centimeters PB-6 centimeters. What is the area of the rectangle PCRQ?