Parts of a Circle

Front

A line that passes through the center of the circle and touches two points on its boundary.

Back

Diameter

Front

A line segment with both endpoints on the circle.

Back

Chord

Front

The point that is equidistant from all points on the circle.

Back

Center of a Circle

Front

Circle with a diameter of 78 cm. What is its radius?

Back

The radius is 39 cm.

Front

Circumference of a circle with diameter 23 mm. Use pi=3

Back

69 mm

Front

Calculation for circumference with radius 58 cm. Use pi=3

Back

2 \times 3 \times 58 = 348 cm

Front

Calculation for the area of a circle with radius 5 m

Back

Front

Value of pi

Back

\pi (pi) is approximately 3.142.

Front

Calculation for the area of a circle with diameter 10 cm. Use pi=3

Back

3 \times (5^2) = 75 cm²