Finding Quadrilateral Side Lengths
Grade 345 min
Learning Objective
I can use addition and subtraction to determine the length of an unknown side of a quadrilateral when given the perimeter and the lengths of the other three sides.
Lesson Flow
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Finding missing side length when given perimeter | Math | 3rd grade | Khan Academy
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Practice
7 questions • Short answer
Exit Ticket
“A quadrilateral has a perimeter of 30 cm. Three of its sides are 6 cm, 8 cm, and 7 cm long. What is the length of the missing side? The perimeter of a quadrilateral is 45 meters. If three of its sides measure 10 meters, 12 meters, and 15 meters, what is the length of the fourth side? A quadrilateral has sides of 5 inches, 9 inches, and 11 inches. If the perimeter is 32 inches, what is the length of the missing side?”
Teacher Guide
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