Vocabulary
Circumference
Area of a Circle

### 100

A round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the center)

A circle

### 100

How do you find the radius of a circle when given the diameter?

divide the diameter by 2

### 100

How do you find the diameter of a circle when given the radius?

### 100

What is the formula for finding the circumference of a circle?

### 100

What is the formula for finding area of a circle?

### 200

A straight line from the center to the circumference of a circle

### 200

What is the radius of a circle that has an 8-foot diameter?

4 ft.

### 200

What is the diameter of a circle with a radius of 5 inches?

10 inches

### 200

Find the circumference of this circle when pi=3

84 m.

### 200

Find the area of this circle when pi = 3

588 m.

### 300

A straight line passing from side to side through the center of  a circle

Diameter

### 300

What is the radius of this circle?

6 cm.

### 300

What is the diameter of a circle with a radius of 100 feet?

200 ft.

### 300

What is the circumference of a circle with a radius of 6 inches when pi = 3.14?

37.68 inches

### 300

What is the area of a circle with a radius of 5.5 inches when pi = 3.14?

94.985 inches

### 400

the distance around the circle. It is the circle's perimeter

circumference

### 400

What is the radius of this circle?

3.1 mm

### 400

What is the diameter of this circle?

28 m

### 400

What is the circumference of this circle when pi = 3.14?

28.26 in.

### 400

What is the area of this circle when pi = 3.14?

28.26 in.

### 500

The amount of space inside the boundary of a flat (2-dimensional) object such as a triangle or circle

Area

### 500

What is the radius of a circle that has a 325-foot diameter?

162.5 ft.

### 500

What is the diameter of a circle with a radius of 215 inches?

430 in.

### 500

What is the circumference of this circle when pi = 3.14?

19.468 mm

### 500

What is the area of this circle when pi = 3.14?

30.1754 mm