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# In a Right Triangle Abc, ∠B = 90°. If Ac = 13 Cm, Bc = 5 Cm, Find Ab - CBSE Class 8 - Mathematics

ConceptEstimating Square Root

#### Question

In a right triangle ABC, ∠B = 90°. If AC = 13 cm, BC = 5 cm, find AB

#### Solution

ΔABC is right-angled at B.

Therefore, by applying Pythagoras theorem, we obtain

AC2 = AB2 + BC2

(13 cm)2 = (AB)2 + (5 cm)2

AB2 = (13 cm)2 − (5 cm)2 = (169 − 25) cm2 = 144 cm2

AB = (sqrt(144)) cm = (sqrt(12xx12)) cm

AB = 12 cm

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#### APPEARS IN

NCERT Solution for Mathematics Textbook for Class 8 (2018 to Current)
Chapter 6: Squares and Square Roots
Ex. 6.40 | Q: 7.2 | Page no. 108
Solution In a Right Triangle Abc, ∠B = 90°. If Ac = 13 Cm, Bc = 5 Cm, Find Ab Concept: Estimating Square Root.
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