1.1 Vocabulary Practice Flashcard

Front

Is the red line a radius or diameter of the circle?

Back

Diameter

Front

Which definition describes π?

Back

The ratio of the circumference of a circle to its diameter

Front

A circle is a collection of ________ on the same plane ________ from the same point. The ________ of a circle is the point from which all points on the circle are equidistant.

Back

points, equidistant, center

Front

Is the red line a radius or diameter of the circle?

Back

Radius

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 radius r?

Back

A = πr²

Front

What do you call the longest chord in a circle?

Back

Diameter

Front

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

Back

Radius

Front

If the diameter of a circle is 10 cm, what is the radius?

Back

5 cm

Front

What is the relationship between the radius and diameter?

Back

Diameter = 2 × Radius