6.4 Warm-Up

Front

What is the formula for finding the perimeter of a polygon?

Back

The perimeter of a polygon is the sum of the lengths of all its sides.

Front

Define a tangent in relation to a circle.

Back

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

Front

What is a secant line in a circle?

Back

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

Front

Define a chord in a circle.

Back

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

Front

What is the diameter of a circle?

Back

The diameter is a chord that passes through the center of the circle and is the longest chord.

Front

How do you find the measure of an arc in a circle?

Back

The measure of an arc can be found using the central angle that subtends the arc.

Front

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

Back

The diameter is twice the length of the radius.

Front

If a tangent and a radius meet at a point on the circle, what is the angle formed?

Back

The angle formed is a right angle (90 degrees).

Front

What is the difference between a chord and a secant?

Back

A chord connects two points on the circle, while a secant intersects the circle at two points.

Front

How do you calculate the length of a tangent segment from a point outside the circle?

Back

The length of the tangent segment can be found using the Pythagorean theorem.