Circles and Angles Test Corrections

The diameter of a circle is 16 cm. What is the circle's area? Round your answer to the nearest hundredth.

• 200.96 square cm

• 50.24 square cm

• 25.12 square cm

What is the area of the largest circle? DO NOT TYPE ANY LABELS.

A circular table cloth has a radius of 6.25 feet. Josie is sewing a piece of ribbon around the edge of the tablecloth. If Josie has exactly enough ribbon, which measurement is closest to the length of the piece of ribbon in feet?

• 18.675 ft

• 19.625 ft

• 39.25 ft

• 39.062

• 21.58 square feet

• 50.24 square feet

• 200.96 square feet

A circular railroad-crossing sign has a diameter of 36 inches. Which measurement is closest to the area of the sign in inches?

• 1017.36 square inches

• 4069.44 square inches

• 113.04 inches

• 56.52 inches

• The circumference of a circle is equal to the diameter times π

• The radius of a circle is equal to the circumference times π

Which of the statements about π is true?

• The circumference of a circle is equal to the diameter divided by π.

• π is equal to the circumference of a circle divided by the diameter.

• π is equal to the circumference of a circle divided by the radius.

The radius of a circle is 8 cm. Which statement accurately describes the circumference of the circle?

• 25.12 cm

• 50.24 cm

• 113.04 cm

The radius of a circle is 8 cm. Which statement accurately describes the circumference of the circle?

• 12π

• 8π

• 16π

The sum of the measures of angle R and angle S are 90°.

The measure of angle R is 5x+25.

The measure of angle S is 15.

What is true about the value of x?

• The value of x is 10.

• The value of x is 5.

• The value of x is 15.