Finding Unknown Side Lengths
Grade 345 min
Learning Objective
I can find a missing side length of a shape when I know the other side lengths.
Lesson Flow
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3rd Grade Math 11.3, Algebra, Find Unknown Side Lengths
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Practice
7 questions • Short answer
Exit Ticket
“A triangle has sides that measure 7 cm, 9 cm, and 5 cm. What is the perimeter of the triangle? A rectangle has sides that measure 12 inches, 6 inches, 12 inches, and 6 inches. What is the perimeter of the rectangle? A shape has sides that measure 8 feet, 8 feet, 8 feet, 8 feet, 8 feet, and 8 feet. What is the perimeter of the shape?”
Teacher Guide
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