Mathematics · Grades 3

Picture Frame Molding Fit

Find an unknown side length of a rectangle from its perimeter, using the fact that opposite sides are equal.

About 12 minutesAdvanced levelInteractive practice
Start Picture Frame Molding Fit

What children practice

  • Missing-Side Fence Repair: Solve perimeter problems that require finding an unknown side length.

How to use this activity

Invite your child to try the challenge independently first. Encourage them to explain their thinking, use the immediate feedback, and try again when an answer does not work. Short, repeated practice helps build confidence.

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