Circle Geometry Concepts

This video tutorial covers the basics of circle geometry, including parts of a circle such as the center, radius, diameter, chord, secant, and tangent. It explains central and inscribed angles, as well as minor and major arcs. The tutorial also demonstrates how to calculate the area and circumference of a circle using given formulas. Finally, it provides problem-solving examples involving circle measurements and arc measures.

What is the term for a line segment that connects the center of a circle to any point on its circumference?

• Chord

• Radius

• Diameter

• Secant

Which of the following is a line that touches a circle at exactly one point?

• Chord

• Secant

• Tangent

• Radius

What is the name of an angle whose vertex is at the center of the circle?

• Exterior Angle

• Interior Angle

• Central Angle

• Inscribed Angle

Which angle has its vertex on the circle and its sides containing chords of the circle?

• Inscribed Angle

• Central Angle

• Exterior Angle

• Interior Angle

What is a minor arc?

• An arc exactly 180°

• An arc more than 180°

• An arc that is a full circle

• An arc less than 180°

How many points are used to define a major arc?

• Three

• Four

• Two

• One

What is the formula for the circumference of a circle?

• r²

• πd

• 2πr

• πr²

If the diameter of a circle is 16.6 meters, what is the radius?

• 33.2 meters

• 4.15 meters

• 16.6 meters

• 8.3 meters

Given a circle with a circumference of 10681 cm, what is the approximate radius?

• 106 cm

• 53 cm

• 34 cm

• 17 cm

If the area of a circle is 95.3 square feet, what is the approximate diameter?

• 44 feet

• 11 feet

• 22 feet

• 5.5 feet