Question

CHOOSE THE CORRECT ANSWER:
1. With reference to a circle , the value of n is equal to
a)
b)
circumference
c)
circumference
diameter
area
area
diameter
d)
circumference​

Answer 1

Answer:

You might have suspected this before, but in fact, the distance from the center of a circle to any point on the circle itself is exactly the same.

Radius of a circle

This distance is called the radius of the circle.

Which of the segments in the circle below is a radius?

Choose all answers that apply:

Choose all answers that apply:

Diameter of a circle

The diameter is the length of the line through the center that touches two points on the edge of the circle.

Which of the segments in the circle below is a diameter?

Choose all answers that apply:

Choose all answers that apply:

Notice that a diameter is really just made up of two radii (by the way, "radii" is just the plural form of radius):

So, the diameter ddd of a circle is twice the radius rrr:

d = 2rd=2rd, equals, 2, r

Find the diameter of the circle shown below.

units

Explain

Find the radius of the circle shown below.

units

Explain

Circumference of a circle

The circumference is the distance around a circle (its perimeter!):

Here are two circles with their circumference and diameter labeled:

Let's look at the ratio of the circumference to diameter of each circle: