Finding the Area of a Triangle
aligned to Cbse
Learning Objective
find area of plane figures
Lesson Flow
Watch Video
How to Find the Area of the Shaded Region | Triangle in a Square | Math with Mr. J
Math with Mr. J
Guided Notes
Key concepts students will learn:
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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.
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The area of the outside square, with sides of 7 yards each, is found by squaring the side length: 7² = 49 square yards.
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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
5 questions • Multiple choice & Short answer
Exit Ticket
“A rectangle with a length of 10 cm and a width of 6 cm has a triangle cut out of it. The triangle has a base of 4 cm and a height of 3 cm. What is the area of the remaining shaded region?”
Teacher Guide
Get the complete package:
- Answer keys for all questions
- Differentiation strategies
- Extension activities
- Printable student handouts
