Referring to the figure below ∠BAC=90° and D is the midpoint of BC . If BC=10 cm, What is the value of AD in cm?
A
3
B
4
C
5
D
52
Correct Answer: 5
18S 36R 12Q 6P7 = 18×36÷12 - 6 + 7 = 18×3 - 6 + 7 = 54 - 6 + 7 = 55