6.4 Warm-Up

Front

What is the measure of arc NM if it is given as 186°?

Back

The measure of arc NM is 186°.

Front

If segments that appear to be tangent are tangent, what is the value of x if it is given as 2?

Back

The value of x is 2.

Front

What part of the circle is defined as a segment connecting two points on the circle?

Back

A chord is a segment connecting two points on the circle.

Front

How do you find the perimeter of a polygon?

Back

To find the perimeter of a polygon, sum the lengths of all its sides.

Front

What is a tangent in relation to a circle?

Back

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

Front

What is the definition of a secant?

Back

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

Front

What is the difference between a radius and a diameter?

Back

A radius is half the length of a diameter; it extends from the center to the circle's edge.

Front

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

Back

The diameter is 10 cm (2 times the radius).

Front

What is the formula for the circumference of a circle?

Back

The circumference C = 2πr, where r is the radius.

Front

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

Back

The area A = πr² = 28.27 cm² (approximately).