Draw a circle and inscribe an obtuse triangle in the circle.

What is the name of the longest chord in any circle?

Can any chord on a circle be a radius?

Describe the three possible arcs that could be found on a circle.

What is true of all radii of a circle?

How many chords on a circle can be a diameter of the circle?

What is a semicircle?

Define a circle without using the word "round".

What is an inscribed polygon?

If an arc makes a central angle of 109°, is it a major or minor arc? Explain how you know.

Draw a circle O with radius 22. Then draw radii and to form an angle of 60 degrees. What is the length of ?

An isosceles right triangle inscribed in a circle. If the length of the two equal sides is 22 cm, find the radius of the circle.

Circles that have same radius are called ______.

		semicircles
		conjoint circles
		concentric circles
		congruent circles

A ______ is a line that intersects a given circle in two points.

		tangent
		chord
		secant
		diameter

What is wrong with the statement: "All radii are congruent."?

Jennifer is working on a sewing project. She has a circular piece of fabric, and needs to find the center. How can she do that?

How can you illustrate the definition of a circle?

Can any chord of a circle ever equal the radius?