parts of a circle

Front

What is the distance from the center of a circle to any point on its circumference called?

Back

Radius

Front

What do you call a line segment that passes through the center of a circle and has its endpoints on the circle?

Back

Diameter

Front

What is the name of the point that is equidistant from all points on the circumference of a circle?

Back

Center

Front

What is a line that intersects a circle at two points called?

Back

Secant

Front

What is a line that touches a circle at exactly one point called?

Back

Tangent

Front

What do you call a line segment whose endpoints lie on the circle?

Back

Chord

Front

What is the total distance around a circle called?

Back

Circumference

Front

If the radius of a circle is 5 cm, what is the diameter?

Back

10 cm

Front

What is the formula for the circumference of a circle?

Back

C = 2πr or C = πd

Front

What is the area of a circle with a radius of 3 cm?

Back

28.27 cm² (A = πr²)