Circles (12/1/23)

Front

What is the definition of a circle?

Back

A circle is a set of points in a plane that are equidistant from a fixed point called the center.

Front

What is the formula for the circumference of a circle?

Back

The circumference (C) of a circle is given by the formula C = 2πr, where r is the radius.

Front

What is the formula for the area of a circle?

Back

The area (A) of a circle is given by the formula A = πr², where r is the radius.

Front

What is a secant line in relation to a circle?

Back

A secant line is a line that intersects a circle at two points.

Front

What is a tangent line in relation to a circle?

Back

A tangent line is a line that touches a circle at exactly one point.

Front

What is the relationship between the radius and diameter of a circle?

Back

The diameter (d) of a circle is twice the length of the radius (r), expressed as d = 2r.

Front

What is the center of a circle?

Back

The center of a circle is the fixed point from which all points on the circle are equidistant.

Front

What is the chord of a circle?

Back

A chord is a line segment whose endpoints lie on the circle.

Front

What is the difference between a major arc and a minor arc?

Back

A minor arc is an arc that is less than 180 degrees, while a major arc is an arc that is greater than 180 degrees.

Front

What is the formula for the length of an arc?

Back

The length of an arc (L) can be calculated using the formula L = (θ/360) * 2πr, where θ is the central angle in degrees and r is the radius.