Suppose a triangle with area 28 has a base 7x and a height of 4x. The base and height are respectively

The sides of an equilateral triangle are (2a - b) cm, (a + 3b)cm and (2a - 2b + 1)cm, then the perimeter of the triangle is 

The area of triangle whose sides are 3cm, 4cm and 5cm is 

Area of an equilateral triangle with side x is 

Area of a triangle if its base, b and height, h are given is 

Δ ABC shown below is inscribed inside a square of side 20cm. Find the area of the triangle

The area of right angled triangle is 20cm² and one of the sides containing the right triangle is 4 cm. Then the altitude on the hypotenuse is 

A square and an equilateral triangle have equal perimeters. If the diagonal of the square is , then the area of the triangle is

Heron's formula is 

The base of the traingle is 15dm and its height is 12dm. The height of another triangle of double the area and the base of which is 20 dm is