Unit 6C

Front

What is the center of a circle?

Back

The center of a circle is the point that is equidistant from all points on the circle's circumference.

Front

What is the radius of a circle?

Back

The radius of a circle is the distance from the center of the circle to any point on its circumference.

Front

What is the diameter of a circle?

Back

The diameter of a circle is twice the length of the radius and is the longest distance across the circle.

Front

How do you calculate the area of a circle?

Back

The area of a circle is calculated using the formula A = πr², where r is the radius.

Front

What is the value of π (pi) used in calculations?

Back

The value of π (pi) is approximately 3.14.

Front

What is a sector of a circle?

Back

A sector of a circle is a portion of the circle enclosed by two radii and the arc between them.

Front

How do you find the area of a sector?

Back

The area of a sector can be found using the formula A = (θ/360) × πr², where θ is the angle in degrees.

Front

What is the relationship between diameter and radius?

Back

The diameter is twice the radius (d = 2r).

Front

What is the circumference of a circle?

Back

The circumference of a circle is the distance around it, calculated using the formula C = 2πr.

Front

How do you convert diameter to radius?

Back

To convert diameter to radius, divide the diameter by 2 (r = d/2).