If ΔABC is a right angled triangle with ∠ABC = 90°, and AC = 10 cm, BC = 8 cm, then the length of AB is :
Answer & explanation
Correct answer: option 4
We know that,
AC2 = AB2 + BC2
We have,
∠ABC = 90°
AC = 10 cm
BC = 8 cm
= 102 = (AB)2 + (8)2
= AB2 = 100 – 64 = 36
= AB = 6 cm