Question

Area
of triangle is equal to?​

Answer 1

As we know that the area of each triangle is one-half the area of the rectangle. So, the area A of a triangle is given by the formula

$A=12bh$ where b is the base and h is the height of the triangle.

The Formula of Area:

As we know the most basic area formula is the formula for the area of a rectangle. The Given a rectangle with length l and width w,

The formula for the area is:

A = lw (rectangle)

Area of a triangle:

• If we have to calculate the area of a triangle,
• then multiply the height by the width then divide by 2.

• Then Find the area of a triangle where height = 5 cm and width = 8 cm.

• Then The area of a triangle is equal to (the length of the altitude) × (the length of the base) / 2.
• So, In ∆ABC, BD is the altitude to base AC and AE is the altitude to base BC.

Hence, The area of a triangle $=\frac{1}{2}$ * base * Height.

Answer 2

Given: Given figure is a triangle.

To find: We have to find out the area of a triangle.

Solution:

Area of a triangle can be determined using two method one by using base and height and other by using perimeter and length of sides of triangle.

• If we know the base and height of a triangle then we can easily calculate its area by the below formula
• $area = \frac{1}{2} \times base \times height$
• If we know the three sides of a triangle then area can be calculated by the below formula
• $\sqrt{s(s - a)(s - c)(s - b)}$where s is the perimeter of the triangle and a, b, c are its respective sides.