Perimeter of a triangle

Area and Perimeter of triangle

Prove that the perimeter of any triangle is greater than the sum of three altitudes.

If triangle ABC is similar to triangle PQR , Perimeter of triangle ABC = 30 cm , Perimeter of triangle = 45 cm , PR = 9 cm then find AC.

The sum of altitudes of a triangle is than the perimeter of the triangle._______

The side of an equilateral triangle is 672-cm long, then the perimeter of the triangle is

The inradius of an equilateral triangle is sqrt(3)cm, then the perimeter of that triangle is

The area of the circumcircle of an equilateral triangle is 3pi sq. cm. The perimeter of the triangle is