Finding the Perimeter

Front

What is perimeter?

Back

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

Front

How do you find the perimeter of a rectangle?

Back

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

Front

If a rectangle has a length of 5 cm and a width of 3 cm, what is its perimeter?

Back

Perimeter = 2(5 cm + 3 cm) = 16 cm.

Front

What is the perimeter of a square with each side measuring 4 cm?

Back

Perimeter = 4 sides × 4 cm = 16 cm.

Front

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

Back

Add the lengths of all three sides: Perimeter = side1 + side2 + side3.

Front

If a triangle has sides measuring 3 cm, 4 cm, and 5 cm, what is its perimeter?

Back

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

Front

What is the perimeter of a shape with sides measuring 2 cm, 3 cm, and 5 cm?

Back

Perimeter = 2 cm + 3 cm + 5 cm = 10 cm.

Front

How do you calculate the cost of a border if it costs $2 per foot and the perimeter is 10 feet?

Back

Cost = Perimeter × Cost per foot = 10 feet × $2 = $20.

Front

What is the perimeter of a figure with two sides measuring 6 cm and two sides measuring 4 cm?

Back

Perimeter = 6 cm + 6 cm + 4 cm + 4 cm = 20 cm.

Front

If a name plate has a perimeter of 18 cm, what could be its possible dimensions?

Back

Possible dimensions could be 5 cm by 4 cm (5+5+4+4=18 cm).