The area of a sector with central angle θ and radius r is:

\(\displaystyle{A}=

\(\displaystyle{A}=

Question

asked 2020-11-08

The shaded sector above covers \(\displaystyle\frac{{1}}{{2}}\) of the circle. If the radius of the circle above is 3 cm, what is the area of the sector in terms of ππ.
A. \(\displaystyle{1.125}π{c}{m}^{{2}}\)

B. \(\displaystyle{14.13}π{c}{m}^{{2}}\)

C. \(\displaystyle{4.5}π{c}{m}^{{2}}\)

D. \(\displaystyle{2.25}π{c}{m}^{{2}}\)

B. \(\displaystyle{14.13}π{c}{m}^{{2}}\)

C. \(\displaystyle{4.5}π{c}{m}^{{2}}\)

D. \(\displaystyle{2.25}π{c}{m}^{{2}}\)

asked 2020-11-29

The formula \(C=2\pi r\) relates the circumference C of a circle to its radius r.

(a)Solve \(C=2\pi r\) for r

(b) If a circle's circumference is 15 inches, what is its radius? leave the symbol \(\pi\) in your answer.

(a)Solve \(C=2\pi r\) for r

(b) If a circle's circumference is 15 inches, what is its radius? leave the symbol \(\pi\) in your answer.

asked 2020-12-17

Carlos is spreading mulch in a circle on top of an area where he has planted some seeds. He has enough mulch to cover an area that is 12.5 square feet. How much rubber edging does Carlos need to encircle the mulch that will cover the seeds?

asked 2021-03-08

What is the area of a circle with a radius of 8 inches?

asked 2021-02-21

A circle has a circumference of \(\displaystyle{48}π\) centimeters. If the radius of the circle is multiplied by 9, what is the circumference of the new circle?

asked 2021-02-09

A small object is located 30.0cm in front of a concave mirror with a radius of curvature of 40.0 cm. Where will the image be formed?

asked 2020-10-20

Explain your reasoning,
the distance around a circle
a times the diameter the (5cm) Praciice and Problem
Find the radius of the button.

asked 2021-01-16

what is the equation of a circle with the center (2, -4) and the radius 4.

asked 2020-11-11

[Pic]
This arch is formed by an arc of a circle. What is the radius of the circle?

A. 1.500 m

B. 1.875 m

C. 3.000 m

D. 3.750 m

A. 1.500 m

B. 1.875 m

C. 3.000 m

D. 3.750 m

asked 2020-11-08

The square surface cover shown in the figure is 10.16 centimeters on each side. The knockout in the center of the cover has a diameter of 1.27 centimeters. Find the area of the cover to the nearest hundredth centimeter.