Mathematics - Class ...

Q1. Use Heron's formula to find the area of a triangle when a = 3 cm, b = 5 cm, and c = 4 cm.

Q2. What is the area of an equilateral triangle with side 15cm?

Q3. Find the area of a triangle two sides of which are 7m and 6m and the perimeter is 22m.

Q1. Sides of a triangle are in the ratio of 2 : 7 : 5 and its perimeter is 140cm. Find its area.

Q2. An isosceles triangle has perimeter 85 cm and each of the equal sides is 25 cm. Find the area of the triangle.

Q3. Find the area of triangle ABC, if side AB = 3, BC = 2, CA =4.

Q1. A sign board, indicating ‘Falling Rocks’ is an equilateral triangle with side ‘a’. Find the area of the sign board, using Heron’s formula if its perimeter is 75 cm.

Q2. There is a triangular plot. If the sides are 15 m, 11 m and 6 m, find the area triangular plot.

Q3. Sides of right angle are in the ration of 3:5:7 and its perimeter is 300m. Find the area of a triangle.