Pretest (Area of Circles, Semicircles, and Quadrants)

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

• πr²
• 2πr
• √π

Tags

CCSS.7.G.B.4

Find the area of the circle below. Use pi = 3.14.

radius = 3 cm.

• 100.26 cm

• 225.26 cm

• 9.26 cm

• 28.26 cm

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's area? Use pi = 3.14.

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 28.26 m²

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

What is the area of the shaded region (quadrant)? Use pi = 3.14.

• 1.26

• 452.39

• 9.42

• 113.04