Vocabulary/ Formulas
Circumference
Area of Circles
Scale Factor
Similar shapes
100

The space inside a shape

What is area?

100
The circumference of a circle with a radius of 4 inches
What is 25.12 inches?
100
The area of a circle with a radius of 5 inches
What is 78.5 inches squared?
100

The sides of a square measure 6 inches.  It is dilated by a scale factor of 4.  What is the measurement of each side?

What is 24 inches?

100

Find the missing side.


What is 3?

200

The distance around a circle (it's perimeter)

What is the circumference?

200
The circumference of a circle with a radius of 10 cm
What is 62.8 cm?
200
The area of a circle with a radius of 7 cm
What is 153.86 cm squared?
200

Description of the similar shape with a scale factor greater than 1

What is an enlargement?

200

What is the missing side?


What is 20?

300

The segment from the center of a circle to the edge (half of the diameter)

What is the radius?

300
The circumference of a circle with a diameter of 10 feet
What is 31.4 feet?
300
The area of a circle with a radius of 40 feet.
What is 5024 feet squared?
300

A rectangle that is 2 inches by 3 inches has been scaled by a factor of 7. What are the side lengths of the scaled copy?

What is 14 inches by 21 inches?

300


What is 12?

400

The ratio of a circle's circumference divided by its diameter

What is pi?

400
The circumference of a circle with a diameter of 30 cm
What is 94.2 cm?
400

The area of a circle with a diameter of 6 inches.

What is 28.26 inches squared?

400

What is the scale factor of Triangle ABC to DEF?


What is 1/2?

400

To find the height of a very tall pine tree, you place a mirror on the ground and stand where you can see the top of the pine tree.  How tall is the tree?


What is 72 ft?

500

The formula to find a circle's diameter given its circumference.

What is d=circumference/pi?

500

What is the diameter of a circle with the circumference of 628 inches?

What is 200 in?

500
The area of a circle with a diameter of 25 cm
What is 490.625 cm squared?
500

What is the area of the smaller rectangle?


What is 29.4 feet squared?

500

What is the perimeter of the larger triangle?


What is 36 feet?

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