Finding a Missing Side Using Perimeter
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Objective
I can use addition and subtraction to figure out the missing side of a shape when I know its perimeter.
Part 1 of 3
Warm-up video
Unknown Channel · 5:00
We don't generate video — this one is by Unknown Channel on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 3
Practice
2 questions
A rectangular garden has a perimeter of 28 meters. One of the sides is 6 meters long. What is the length of the missing side?
A rectangle has a perimeter of 45 centimeters. One side is 7 centimeters long. What are the lengths of all the sides of the rectangle?
Part 3 of 3
Exit ticket
Quick comprehension check
“A rectangle has a perimeter of 30 cm. One of the lengths is 8 cm. What is the width of the rectangle? A rectangle has a perimeter of 26 meters. One of the widths is 4 meters. What is the length of the rectangle? ”
Sample answer included in the free materials
Get the materials
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Teacher Guide
Complete lesson plan with answer keys and alternate activities
Student Handout
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