# What is a circle on a graph called?

## What is a circle on a graph called?

A circle graph is also known as a pie chart. The graph is in the shape of a circle with different wedges that each represent a percentage of a total. These wedges often look like pieces of pie, which is why the circle graph is sometimes referred to as a pie chart.

What is the equation of the circle graph?

The equation of a circle appears as (x – h)2 + (y – v)2 = r2. This is called the center-radius form (or standard form) because it gives you both pieces of information at the same time. The h and v represent the coordinates of the center of the circle being at the point (h, v), and r represents the radius.

How do you graph a circle on a graphing calculator?

Solution Using DRAW:

1. Press ZOOM#4 (ZDecimal) to go to a graphing screen.
2. To graph the circle, press 2nd PRGM (DRAW) #9 Circle.
3. Move the cursor to the “h” value of +2 by using the arrows.
4. Move the cursor to the “k” value of +1 by using the arrows.
5. Press ENTER to set the point for the center of the circle.

### What is the equation of the circle shown?

The equation of a circle with center (h,k) and radius r units is (x−h)2+(y−k)2=r2 .

How do you make a circle graph?

Graphing the Circle Know the equation of a circle. The standard form for the equation of a circle is (x – a)2 + (y – b)2 = r2. Find the center of your circle. Remember that the center of the circle is shown as a and b in the circle equation. Find the radius of the circle. Recall that the r represents the radius.

What is the formula for graphing circles?

The first thing you need to know in order to graph the equation of a circle is where on a plane the center is located. The equation of a circle appears as (x – h) 2 + (y – v) 2 = r 2. This is called the center-radius form (or standard form) because it gives you both pieces of information at the same time.

#### How do you calculate the percentage of a circle?

Divide the angle measure by 360 because to find the portion of the circle represented by the sector. For example, if the sector measures 162 degrees, divide 162 by 360 to get 0.45. Multiply the portion by 100 to convert to a percentage.

What are the parts of a circle graph?

Radius: The constant distance from its centre is called the radius of the circle.

• Chord: A line segment joining two points on a circle is called a chord of the circle.
• Diameter: A chord passing through the centre of a circle is called the diameter of the circle.
• Arc: A continuous piece of a circle is called an arc.