herons formula

The semi perimeter of a triangle having the length of its sides as 20 cm, 15 cm and 9 cm is

• 44 cm

• 21 cm

• 22 cm

• None

Semi perimeter of scalene triangle of side k, 2k and 3k is

• k

• 2k

• 3k

• None

If the area of an equilateral triangle is 16√3 cm², then the perimeter of the triangle is

• 48 cm

• 24 cm

• 12 cm

• 36 cm

The edges of a triangular board are 6 cm, 8 cm and 10 cm. The cost of painting it at 0.09 per cm² is

• 2.00

• 2.16

• 2.48

• 3.00

Find the area of an equilateral triangle with side 10 cm.

The area of a triangle is 48 cm². If its base is 12 cm, find its altitude.

• 8 cm

• 9cm

• 10cm

The area of an equilateral triangle is 81√3 cm². Find its height.

The perimeter of an equilateral triangle is 60 m. The area is

• 10√3 m²

• 15√3 m²

• 20√3 m²

• 100√3 m²

The perimeter of a field in the form of an equilateral triangle is 48 cm. Determine the area of the field.

• 96 cm²

• 48√3 cm²

• 64√3 cm²

• 144 cm²

The sides of a triangle are in the ratio 5:12:13. If the perimeter of the triangle is 90 cm, find the area of the triangle.

• 450 cm²

• 180 cm²

• 360 cm²

• 270 cm²