Topic Assessment Form a Geometry

Find the area of the shaded region:

• 350 cm²

• 137.5 cm²

• 212.5 cm²

• 484.2 cm²

Jeff drew a circle inside a square, as shown below.  Which method can Jeff use to find the area of the square not covered by the circle?

• Subtract the area of the circle from the area of the square.

• Subtract the area of the square from the area of the circle.

• Subtract 1/4 the area of the square from the area of the circle.

• Subtract 1/4 the area of the circle from the area of the square.

How does scale factor change the area?

• by the scale factor

• by the scale factor squared

• by the scale factor cubed

• scale factor does not affect the area

If the area of a square was 16 in² and now it is 256 in², what is the scale factor that was used?

• 4

• 2

• 3

• 12

What is the formula for the area of a triangle?

• A=bh

• A=1/2 bh

• A=1/2 (b₁+b₂) h

• A=πr²

What is the formula for the area of a circle?

• =2πr

• =2πd

• =πr²

• =2πr²

What is the formula for the circumference of a circle?

• C=2πr

• C=2πd

• C=πr²

• C=2πr²

Find the area of the following figure using estimation.

• 43 units²

• 61 units²

• 50 units²

• 35 units²