My Math 4th Grade Area and Perimeter flashcard

Front

What is area?

Back

Area is the amount of space inside a shape, measured in square units.

Front

What is perimeter?

Back

Perimeter is the distance around a shape, calculated by adding the lengths of all its sides.

Front

How do you calculate the area of a rectangle?

Back

Area = length × width.

Front

How do you calculate the perimeter of a rectangle?

Back

Perimeter = 2 × (length + width).

Front

If a square has a side length of 4 cm, what is its area?

Back

16 cm² (Area = side × side = 4 cm × 4 cm).

Front

If a square has a side length of 5 m, what is its perimeter?

Back

20 m (Perimeter = 4 × side = 4 × 5 m).

Front

What is the area of a rectangle with a length of 6 cm and a width of 3 cm?

Back

18 cm² (Area = length × width = 6 cm × 3 cm).

Front

What is the perimeter of a rectangle with a length of 10 ft and a width of 5 ft?

Back

30 ft (Perimeter = 2 × (length + width) = 2 × (10 ft + 5 ft)).

Front

If Mr. Morel installs 5 rows of 6 tiles, how many tiles does he install?

Back

30 tiles (Total tiles = rows × tiles per row = 5 × 6).

Front

Cassandra earns $19 each day. How much does she earn in 5 days?

Back

$95 (Total earnings = daily earnings × number of days = $19 × 5).