Question

Tell whether the triangle with the given sides length is a right angled triangle.

$20m,21m,29m$

Answer 1

Checking whether the triangle is right triangle or not

For a triangle to be a right angled triangle

${(Longestside)}^2=Sumofsquaresofothertwosides$

Here, Longest side $=29m$

Other two sides $=21mand20m$

Therefore,

${\left(29\right)}^2={\left(21\right)}^2+{\left(20\right)}^2$

$$\begin{gathered} 840=441+400 \\ 841=841 \end{gathered}$$

Hence, given triangle is a right angled triangle.