Perimeter - Missing Side L2

Front

What is Perimeter?

Back

Perimeter is the total distance around the outside of a shape.

Front

How do you calculate the perimeter of a rectangle?

Back

Add the lengths of all four sides or use the formula: P = 2(length + width).

Front

If a rectangle has a length of 10 cm and a width of 5 cm, what is its perimeter?

Back

P = 2(10 cm + 5 cm) = 30 cm.

Front

What is the formula for finding the perimeter of a square?

Back

P = 4 × side length.

Front

If one side of a square is 4 inches, what is its perimeter?

Back

P = 4 × 4 in = 16 in.

Front

What does 'missing side' mean in perimeter problems?

Back

It refers to a side length that is not given, and you need to find it using the perimeter.

Front

If the perimeter of a rectangle is 20 cm and the length is 6 cm, what is the width?

Back

Width = (20 cm - 2 × 6 cm) / 2 = 4 cm.

Front

What is the perimeter of a triangle with sides measuring 3 cm, 4 cm, and 5 cm?

Back

P = 3 cm + 4 cm + 5 cm = 12 cm.

Front

If a shape has a perimeter of 50 inches and three sides are 10 inches each, what is the length of the fourth side?

Back

Fourth side = 50 in - (10 in + 10 in + 10 in) = 20 in.

Front

What is the relationship between perimeter and area?

Back

Perimeter measures the distance around a shape, while area measures the space inside it.