Question

In the triangle $ABC$, when $\angle A={90}^o$ the hypotenuse is ............

• A. $AB$
• B. $BC$
• C. $CA$
• D. None of these

Answer 1

The correct option is B $BC$

Only right angle triangle has a hypotenuse

In $△ABC,\angle A={90}^o$ and sum of other two angle is ${90}^o$

The side opposite to ${90}^o$ angle is the hypotenuse.

And in $△ABC,$ side $BC$ is opposite to $\angle A$

Thus, $BC$ is the hypotenuse,

Hence, option B is correct.