Triangle and its Types

Sides of a triangle are $8 \mathrm{cm}, 8 \mathrm{cm} \& 8 \mathrm{cm}$. Find the perimeter of the triangle.

Sides of a triangle are $7 \mathrm{cm}, 5 \mathrm{cm} \& 6 \mathrm{cm}$. Find the perimeter of the triangle.

An acute angled triangle has only one acute angle.

$16$ lines form $8$ equilateral triangles as shown in the figure.

Remove four lines from the above figure to form four equilateral triangles.

A triangle whose all the angles are of measure less than $90°$ is known as an _____ triangle. (obtuse / acute / equilateral)

In a hexagon, how many triangles are contained? (two/three/four)

In $△\mathrm{PQR}$, $\angle \mathrm{P}=36°$ and $\angle \mathrm{Q}=48°$, then which is the smallest side? $\left(\mathrm{PQ}/\mathrm{RQ}/\mathrm{PR}\right)$