Circumference and 2D Figures

What is the formula of Circumference of a circle?

What is PERIMETER?

• Length of its boundary

• Measure around something

• Measure of the fence & boundaries

• Distance around the figure

What is the formula of PERIMETER OF A RECTANGLE?

What is the formula of PERIMETER OF SQUARE?

The radius of the circle is 9 meters.  What is the circle's circumference? Use 3.14 for pi.

• 9 meters

• 28.26 meters

• 56.52 meters

• 18 meters

Mia, William, and Nora are collaborating on a delightful project to beautify their school's environment by adding a large circular garden. The garden's diameter is a grand 128 inches. They need to calculate the circumference of the garden to order the correct amount of decorative border materials. Can you help them figure it out using the formula C = π × diameter?

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Find the circumference.

• 18 in

• 28.26 in

• 56.52 in

• 254.34 in

Victor measured a circular lid and found ( d ), the diameter, was 8 inches and ( C ), the circumference, was 25 inches. Which expression represents an approximate value for ( π )?

• 25 + 8

• 25 ÷ 8

• 25 × 8

• 25 – 8

Tags

6.7.a

Find the area.

• 25.12 cm²

• 50.24 cm²

• 16 cm²

• 200.96 cm²

Units to measure PERIMETER

• l, ml, kl

• s, h, d

• m, km, hm, dm, cm, etc

• Doesn't have any as such...