Grade 5

Area and perimeter

Inside and around. Part of numbers to a million.

Area and perimeter

Inside and around · Alberta Grade 5 · maddyhelps.com

Name
Date

Find both for each rectangle. Then use the fence question to see that the same perimeter can hold very different areas.

Rectangle	Perimeter	Area
7 m by 4 m
9 m by 9 m
12 m by 5 m
15 m by 2 m

You have 24 m of fence. Fill in the area for each rectangle it could make.

Sides	Area
1 m by 11 m
2 m by 10 m
3 m by 9 m
4 m by 8 m
5 m by 7 m
6 m by 6 m

Which shape holds the most?

For the grown-up

Area and perimeter

7 by 4: perimeter 22 m, area 28 m²; 9 by 9: perimeter 36 m, area 81 m²; 12 by 5: perimeter 34 m, area 60 m²; 15 by 2: perimeter 34 m, area 30 m². 12 by 5 and 15 by 2 have the same perimeter and different areas. Fence: 1 by 11 = 11 m², 2 by 10 = 20 m², 3 by 9 = 27 m², 4 by 8 = 32 m², 5 by 7 = 35 m², 6 by 6 = 36 m². The 6 m by 6 m square holds the most.

Why this matters is on the numbers to a million page. More sheets