Question

Based on the sides, classify the following triangles

Answer 1

Let us assume $c$ represents the longest side of the triangle.

Now, applying the condition for proving the given triangle to be an obtused angled triangle,

$c^2>a^2+b^2$

Here $c=7$, $a=4$ and $b=5$

Thus we get:

$\Rightarrow 7^2>4^2+5^2$

$\Rightarrow 49>16+25$

$\Rightarrow 49>41$

$\therefore$ It is obtuse angled triangle.