8.1 Parts of a Circle Vocab

Front

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

Back

Radius

Front

What is the distance all the way across the circle, but through the center, called?

Back

Diameter

Front

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

Back

Chord

Front

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

Back

Secant

Front

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

Back

Tangent

Front

What is the angle formed by two radii of a circle called?

Back

Central Angle

Front

What is the angle formed by two chords in a circle that share an endpoint called?

Back

Inscribed Angle

Front

What is the total distance around the circle called?

Back

Circumference

Front

What is the formula for the circumference of a circle?

Back

Front

What is the formula for the area of a circle?

Back