Perimeter and Area Flashcards

Grade 4 · Math · Flashcards

Key formulas and quick practice for perimeter and area.

Flashcards

Perimeter: The total distance around the outside of a shape.
Area: The number of square units inside a shape.
Perimeter formula (rectangle): P = 2 × (length + width)
Area formula (rectangle): A = length × width
Perimeter of a 9×4 rectangle: P = 2 × (9+4) = 26 units
Area of a 9×4 rectangle: A = 9 × 4 = 36 square units
Perimeter of a square with side 7: P = 4 × 7 = 28 units
Area of a square with side 7: A = 7 × 7 = 49 square units
Units for perimeter: Linear: cm, m, ft, in — NOT squared
Units for area: Squared: cm², m², ft², in²
Area of a 5×12 rectangle: 60 square units
What does a perimeter problem look like in real life?: Fencing a yard, framing a picture, putting a border around a rug.
What does an area problem look like in real life?: Tiling a floor, painting a wall, buying carpet for a room.