Herons Formula Class 9

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

• 80√3 m²

• 70√3 m²

• 60√3 m²

• 100√3 m²

If the perimeter of an equilateral triangle is 180 cm. Then its area will be:

• 800√3 cm2

• 900√3 cm2

• 700√3 cm2

• 950√3 cm2

The sides of a triangle are 122 m, 22 m and 120 m respectively. The area of the triangle is:

• 1220 sq.m

• 1350 sq.m

• 1320 sq.m

• 1120 sq.m

The sides of a parallelogram are 100 m each and length of the longest diagonal is 160m. The area of a parallelogram is:

• 9600 sq.m

• 9700 sq.m

• 9800 sq.m

• 9500 sq.m

Find the area of a triangle whose sides are 11 m, 60 m and 61 m.

• 335 Sq.m.

• 340 Sq.m.

• 330 Sq.m.

• 350 Sq.m.