Finding the Area of a Triangle
Learning Objective
find area of plane figures
Key Concepts
To find the area of a shaded region with a triangle inside a square, first find the area of the outside square and then subtract the area of the inside triangle.
The area of the outside square, with sides of 7 yards each, is found by squaring the side length: 7² = 49 square yards.
The area of the inside triangle, with a base of 4 yards and a height of 5 yards, is found using the formula: (base × height) / 2 = (4 × 5) / 2 = 10 square yards.
Practice Questions
This lesson includes 5 practice questions to reinforce learning.
View questions preview
1. What formula is used to calculate the area of a square when you know the length of one side?
2. A square has a side length of 8 meters. What is the area of the square?
3. What formula is used to calculate the area of a triangle when you know the base and height?
...and 2 more questions
Educational Video
How to Find the Area of the Shaded Region | Triangle in a Square | Math with Mr. J
Math with Mr. J