Area of a Triangle Calculator

Published on: June 16, 2024

This Area of a Triangle Calculator helps you find the space inside a triangle when the base and height are known. It uses the formula A = ½bh, where b is the base, h is the height, and the answer is written in square units. Multiply the base by the height, then divide by 2 to get the area. It is a simple way to check answers, understand the triangle area formula, and practise basic geometry step by step.


Triangle with base b and height h
In the diagram, the base is b and the height is h.

Step-by-step method

  1. Identify what is given.
  2. Write the formula.
  3. Substitute the values and calculate the area.

Formula:

A = ½bh

Example 1: b = 5, h = 3

Step 1 - Identify what is given.

In this problem: The given values are b = 5 and h = 3.

b=5,h=3

Step 2 - Write the formula.

In this problem: Use the triangle area formula: A = ½bh.

A=½bh

Step 3 - Substitute the values and calculate the area.

In this problem: Substitute b = 5 and h = 3: A = ½ × 5 × 3 = 7.5.

A=½×5×3=7.5

Final answer: A = 7.5

Example 2: b = 7.5, h = 2

Step 1 - Identify what is given.

In this problem: The given values are b = 7.5 and h = 2.

b=7.5,h=2

Step 2 - Write the formula.

In this problem: Use the triangle area formula: A = ½bh.

A=½bh

Step 3 - Substitute the values and calculate the area.

In this problem: Substitute b = 7.5 and h = 2: A = ½ × 7.5 × 2 = 7.5.

A=½×7.5×2=7.5

Final answer: A = 7.5