1
Perimeter
Add up all sides. Square 5 cm: 5+5+5+5 = 20 cm.
Perim 5cm sq = 20 cm
Perimeter & Area
📖 Study · Perimeter and Area
Perimeter and Area
Perimeter is the distance around. Area is the space inside.
🎯 What you'll learn
- ✓Calculate perimeter
- ✓Calculate area of rectangles
2
Area
Length × width. 3-cm × 4-cm rectangle = 12 cm².
3 × 4 = 12 cm²
3
Units matter
Perimeter is in cm or m. Area is in cm² or m².
cm vs cm²
4
Rectangle shortcut
Perimeter = 2 × (length + width).
P = 2(L + W)
5
Counting squares
Area can be found by counting square units inside.
▢▢▢ ▢▢▢ = 6
6
Irregular shapes
Break into rectangles, find each area, add them up.
L-shape = box1 + box2