Finding Height or Base or Radius for Area Formulas

find the area of the circle below.

• 100 cm

• 225 cm

• 9 cm

• 28.26 cm

What is the area of the parallelogram?

• 150 square units

• 120 square units

• 180 square units

What is the circumference of a circle with a radius of 54 m?

• 339.12 m

• 169.56 m

• 84.78 m 

Find the area of a parallelogram with a base of 3.1 cm and a height of 8 cm

• 248 cm²

• 24.8 cm²

• 2.48 cm²

• 2480 cm²

What is the area?

• 12 cm²

• 14

• 14 cm²

• 24 cm²

A cruise ship has a large, circular window. It has a diameter of 8 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 50.27 m²

Which is the correct formula for the area of a circle?

• A = π r²

• A = 2π r²

• A=πd

• A=π d²

Find the Surface Area of the cylinder. Hint: You'll need to know the circumference of the circles to find the area of the cylinders sides. The formula for this is C=πd or 2πr The formula for finding area of the circular bases though is A=πr²

• 3015.93cm²

• 1156.11cm²

• 578.05cm³

• 779.11cm³

Find the total surface area of the cylinder.

Don't forget to divide the diameter by 2 to get the radius. Round to the nearest tenth.

• 25.13 square cm

• 75.40 square cm

• 50.27 square cm

• 100.53 square cm

Find the total surface area of the cylinder.

• 100.53 square inches

• 351.86 square inches

• 251.33 square inches

• 50.27 square inches