Area of Shaded Region Circles

What is/are the formula(s) to find the area of a circle?

• πr²
• 2πr
• √π

Tags

CCSS.7.G.B.4

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

• 100.48 cm²
• 80 cm²
• 200.96 cm²
• 25.12 cm²

Tags

CCSS.7.G.B.4

• 122.46 mi²
• 122. 45 mi²
• 175.84 mi²
• 175.85 mi²

Tags

CCSS.7.G.B.4

What is the approximate area of the shaded region? (Round to the nearest whole number)

(a)  

The diagram below shows the dimensions of Mrs. Prothro’s new swimming pool. A cover is needed for the pool, what will be the approximate area of the cover?

• 720 ft²

• 580.92 ft²

• 592.83 ft²

• 238.5 ft²

Find the area of the shaded region. (The number is 18 cm)

• 63.6 cm ²

• 34.8 cm ²

• 69.5 cm ²

• 98.4 cm ²

The diagram shows two small circles inside a large circle. The large circle has a radius of 8 cm.

Each of the two small circles has a diameter of 4 cm.

Work out the area of the region shown shaded in the diagram. Give your answer correct to one decimal place.

• $175.9cm^2$

• $150cm^2$

• $100cm^2$

Tags

CCSS.7.G.B.4

A logo is designed that has four pink circles within a white square.The square has side length 16cm.

Find the area of the logo that is white.

• $155cm^2$

• $55m^2$

• $54.9cm^2$