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Question

In a rectangle with sides 6 cm and 8 cm, what is the length of the diagonal?

A
16 cm
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B
14 cm
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C
10 cm
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D
12 cm
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Solution

The correct option is C 10 cm

Consider the right-angled triangle BCD right-angled at C.
Using Pythagoras' theorem, we have
BC2+CD2=BD2.
62+82=BD2
BD=10 cm
Thus, the length of the diagonal of the rectangle measures 10 cm.

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