Areas and Perimeter of Circles and Quadrilaterals

Daniel wants to buy cookies for his friend. The

radius of a cookie is 5 inches. What is the cookie’s

circumference? Round to the nearest hundredth. Don't forget to label.

Mrs. Wilson placed the welcome mat shown below on her front door step. What is the PERIMETER of her welcome mat in feet? Round to the nearest hundredth. Don't forget to label.

Find the area of this Semicircle with a diameter of 18 cm

• 254.34 cm

• 127.17 cm

• 56.52 cm

• 28.26 cm

Find the perimeter of the semicircular. Round your answer to the nearest hundredth.

• 23.13 m

• 28.26 m

• 14.13 m

• 56.52 m

what is the area of this semicircle ?
d = 8 cm 

• 100.48 cm²

• 80 cm²

• 200.96 cm²

• 25.12 cm²

If you have been given diameter, how do you find radius?

• Radius times radius

• a.  Radius plus radius

• Diameter divided by 2

Susie needs a cover for her hot tub. It is a circle with a radius of 5cm. How big is the cover?

• 31.4 sq cm

• 78.5 sq cm

• 314 sq cm

• 15.7 sq cm

If I wanted to build a fence around a circular track, I would use ___________

• area

• circumference

• volume

• surface area

If I want to make a border for my garden, I need to know the _______________ of the garden.

• perimeter

• volume

• surface area

• radius

Find the perimeter.

• 2.4 ft

• 6.4 ft

• 5.76 ft

• 1.2 ft