Topic 21 Lessons 1-2 QUIZ

If 30% of the rectangle is shaded, what is the area of the unshaded region? (Rectangle dimensions: 8m by 4m)

• 22.4 square meters

• 19.2 square meters

• 9.6 square meters

• 12.8 square meters

Find the area of the total UNSHADED region in the isosceles trapezoid with base lengths and height given in the diagram.

• 36 square centimeters

• 24 square centimeters

• 48 square centimeters

• 30 square centimeters

Tags

CCSS.6.G.A.1

Find the circumference of a circle with a radius of 3 inches. (Use the formula C = 2πr)

• The circumference is 6π inches (or approximately 18.85 inches).

• The circumference is 9π inches (or approximately 28.27 inches).

• The circumference is 3π inches (or approximately 9.42 inches).

• The circumference is 12π inches (or approximately 37.70 inches).

Tags

CCSS.7.G.B.4

Consider a circle that has rolled from the origin to point G so that OG is the circumference of the circle. Use the diagram to make a statement about the ratio of the circumference to the radius. In other words, what is special about the ratio of the distance the circle rolled to the height of the circle?

• The ratio is always 2.

• The ratio is always π.

• The ratio is always 1/2.

• The ratio is always 4.

Tags

CCSS.7.G.B.4

Find the circumference of the following circle: r = 5. (Use the formula C = 2πr)

• C = 2π(5) = 10π

• C = 2π(5) = 5π

• C = 2π(5) = 25π

• C = 2π(5) = 20π

Tags

CCSS.7.G.B.4

Find the circumference of the following circle: d = 18. (Use the formula C = πd)

• C = π(18) = 18π

• C = π(18) = 9π

• C = π(18) = 36π

• C = π(18) = 81π

Tags

CCSS.7.G.B.4

Find the circumference of the following circle: d = 3/4. (Use the formula C = πd)

• C = π(3/4) = (3/4)π

• C = π(3/4) = (4/3)π

• C = π(3/4) = 3π

• C = π(3/4) = (3/2)π

Tags

CCSS.7.G.B.4

What is the formula to calculate the circumference of a circle if you know its diameter?

• C = π × d

• C = 2 × π × r

• C = d ÷ π

• C = π × r²

Tags

CCSS.7.G.B.4

What is the SUM of the CIRCUMFERENCES of both pizzas?

• 12π

• 24π

• 36π

• 48π

Tags

CCSS.7.G.B.4

Each pizza is cut into 8 equal slices. How much crust is on one slice of the Piggy pizza?

• ⅛

• ⅛π

• 24π

• 3π

Tags

CCSS.HSG.C.B.5