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Question

A triangle ABC is right-angled at B. AB = 6 cm and BC = 8 cm. What is the length of AC?


A

2 cm

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B

10 cm

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C

4 cm

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D

5 cm

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Solution

The correct option is B

10 cm


Given that

A triangle is right-angled at B.

AB = 6 cm and BC = 8 cm.

By Pythagoras theorem,

AB2+BC2=AC2

On substituting the values we get:

62+82=AC2

AC2=100

AC=100

AC=10


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