Question

# A 8. What is the value of AD in the triangle below? (A) 512 (B) 10 (C) 11 (D) 13 20 (E) 1212 B2 11D 5

Solution

lu
D ABC,
An. Ас?, феъ
AC = J AB2-BC2
= √ 400-256
= 12
1b
1 c
Now an a ADC
AD? - Ac2 + De 2
AD = √Ac?+ Dc2
1914 + 25
: (AD = 13]
AD=13