Download docx - Lancaster High School · Web viewThe area of a circle is 121π cm 2 . Find its circumference. Question #4 Don’t forget your units!!! A circle has a radius of 2 cm. a. Find the area

Question #1Don’t forget your units!!!

Find the circumference of the circle below. a.Give an exact answer in terms of π.

b.Use the π button on your calculator and express your answer to the nearest hundredth.


a. Find the perimeter (circumference) of the semicircle. Round your answer to the nearest tenth. (d = 17 in.)b. Find the area of the semicircle to the nearest tenth.


The area of a circle is 121π cm2. Find its circumference.


A circle has a radius of 2cm.

a. Find the area of the circularregion in terms of π.

b. Find the circumference of the circular region in terms of π.


A circle has a radius of 7 cm.

a. Find the exact area of the circular region in terms of π.

b. What is the circumference of the circle?


Joan determined that the area of the circle below is 400 π cm2. Melinda says that Joan’s solution is incorrect; she believes that the area is 100π cm2. Who is correct and why?

d = 20 cm.


The area of a circle is 36 π cm2.

a. Find its radius.

b. Find its diameter.

c. Find its circumference.

Question #8

The circumference of a circle is 9 πcm.

a. What is the diameter?

b. What is the radius?

c. What is the area?

Question #9

Mark created a flowerbed that is semicircular in shape, as shown in the image. The diameter of the flower bed is 5 m.

a.What is the perimeter of the flower bed?

b. What is the area of the flowerbed?

Question #10

The figure below shows a circle inside of a square. If the radius of the circle is 8cm, find the following and explain your solution.

a.The circumference of the circle.

b.The area of the circle.

c. The area of the square.