Area and Perimeter of Triangles

Area and Perimeter of Triangles

Grade 9 · Math · 45 min

What's Included

Learning Objective

I can calculate the area and perimeter of triangles, including using the Pythagorean theorem to find missing side lengths when necessary.

Warm-Up Video

Unknown Channel · 5:00

How to Find the Area and Perimeter of a Triangle | Math with Mr. J

Practice Questions

2 questions · Short answer

Exit Ticket

Quick comprehension check

A right triangle has a base of 8 cm and a hypotenuse of 17 cm. Find the perimeter and area of the triangle. Show all work. An isosceles triangle has two sides that are each 13 inches long and a base of 10 inches. Find the area of the triangle. (Hint: You will need to find the height). Show all work.

Complete Lesson Package

Get all 3 ready-to-use resources:

Teacher Guide
Student Doc
Slides