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### Table of Contents:

- How do you label area of a circle?
- How did you identify the parts of the circle?
- What is the different parts of a circle?
- What is a straight line touching a circle called?
- What is the formula of circle?
- What is the unique characteristics of a circle?
- What is a formula of cylinder?
- What defines a circle?
- Is there a perfect circle?
- How do you prove a point is on the unit circle?
- Can a circle have a radius of 0?
- How do you determine if a point is on the circle?
- What do you call the perimeter of a circle?
- How do you find a point on a circle with the center and radius?
- How many tangents can a circle have?
- How many parallel tangents can a circle have at the most?
- Are tangents of a circle equal?
- How many chords can be drawn in a circle?
- How many radius can be drawn in a circle?
- Which is the longest chord of the circle?
- How many diameters can be drawn in a circle?
- Can a circle have two diameters?
- What is arc of a circle?
- How many circles can be drawn through two points?
- How many circles can be drawn through a single point?
- How many circles can be drawn through four points?
- How many circles can be drawn from three points?

## How do you label area of a circle?

The **area of a circle** is pi times the radius squared (A = π r²). Learn how to use this formula to find the **area of a circle** when given the diameter.

## How did you identify the parts of the circle?

Radius: The distance from the center of the **circle** to its outer rim. Chord: A line segment whose endpoints are on a **circle**. Diameter: A chord that passes through the center of the **circle**. The length of a diameter is two times the length of a radius.

## What is the different parts of a circle?

A tangent is a straight line outside the circle that touches the circumference at one **point** only. A segment is the area enclosed by a chord and an arc (it looks similar to the segment of an orange or grapefruit). A sector is the area enclosed by 2 radii (radius) and an arc (It looks like a slice of cake or pizza).

## What is a straight line touching a circle called?

A chord is a **straight line** joining two points on the circumference of a **circle**. An arc is a part of the circumference of a **circle**. A segment is an area enclosed by a chord and an arc. A tangent is a **straight line** which **touches** the edge of a **circle** once. ...

## What is the formula of circle?

Formulas Related to Circles

Diameter of a Circle | D = 2 × r |
---|---|

Circumference of a Circle | C = 2 × π × r |

Area of a Circle | A = π × r2 |

## What is the unique characteristics of a circle?

A **circle** can circumscribe a rectangle, trapezium, triangle, square, kite. A **circle** can be inscribed inside a square, triangle and kite. The chords that are equidistant from the centre are equal in length. The distance from the centre of the **circle** to the longest chord (diameter) is zero.

## What is a formula of cylinder?

The **formula** for the volume of a **cylinder** is V=Bh or V=πr2h . The radius of the **cylinder** is 8 cm and the height is 15 cm. Substitute 8 for r and 15 for h in the **formula** V=πr2h . ... Therefore, the volume of the **cylinder** is about 3016 cubic centimeters.

## What defines a circle?

A **circle is** a round shaped figure that has no corners or edges. In geometry, a **circle** can be **defined** as a closed, two-dimensional curved shape.

## Is there a perfect circle?

**Perfect circles** do not exist in nature, but you can see some close approximations around CMU's main campus in Pittsburgh.

## How do you prove a point is on the unit circle?

In the case of a **unit circle**, the equation is x2 + y2 = 1. This equation shows that the **points** lying on the **unit circle** have to have coordinates (x- and y-values) that, when you square each of them and then add those values together, equal 1.

## Can a circle have a radius of 0?

In various high school textbooks, when the **radius** of a **circle** is **zero**, it is said that it is a degenerate **circle** of **zero radius**. That means we're looking at a circumference of **zero radius**. Consequently, only one point belongs to the circumference, which is the centre.

## How do you determine if a point is on the circle?

First, **find** the equation for the **circle**. Like this, x^2 + (y - 3)^2 = 9. Then, input the x and y values into the equation. **If** it's bigger than 9, the **point** is outside of the **circle**, **if** it's equal to 9, the **point is on the circle**, and **if** it's smaller than 9, the **point** is inside of the **circle**.

## What do you call the perimeter of a circle?

The **perimeter of a circle** or an ellipse is **called** its **circumference**.

## How do you find a point on a circle with the center and radius?

A common form to write the equation of a **circle** in is the **center**-**radius** form. The **center**-**radius** form is: (x−h)2+(y−k)2=r2 Here, the **center point** is denoted by (h,k) and r is the **radius** of the **circle**.

## How many tangents can a circle have?

A **circle can have** infinite **tangents**. Such lines are called **tangent** lines or simply as **tangents** to the **circle** from a given point. It may be noted that from a particular point outside a **circle** only two **tangents can** be drawn.

## How many parallel tangents can a circle have at the most?

2 parallel tangents

## Are tangents of a circle equal?

**Tangent** to a **Circle** Theorem: A line **is tangent** to a **circle** if and only if the line is perpendicular to the radius drawn to the point of tangency. ... Two **Tangents** Theorem: If two **tangent** segments are drawn from the same external point, then the segments are **equal**.

## How many chords can be drawn in a circle?

210 chords

## How many radius can be drawn in a circle?

We **can draw** as **many radii** to a point on the **circle** by joining the center. Thus every **circle** has an infinite number of **radii**. This is because the number of points on the circumference of the **circle** is infinite.

## Which is the longest chord of the circle?

diameter

## How many diameters can be drawn in a circle?

Moving the diameter line around the circle will just make you dizzy. Drawing a second diameter line on the same circle makes that second line the, uh, diameter. So, you can only draw **one diameter** per circle since that circle only has **one diameter**.

## Can a circle have two diameters?

Hence, any **two diameters have** the same length, hence any **two diameters** are congruent.

## What is arc of a circle?

An **arc of a circle** is any portion of the circumference of a **circle**. To recall, the circumference of a **circle** is the perimeter or distance around a **circle**. Therefore, we can say that the circumference of a **circle** is the full **arc** of the **circle** itself.

## How many circles can be drawn through two points?

Starting from the **two points** as a diameter, we **can draw** a circle. As the circle is moving up it becomes a chord to the next circle with bigger diameter. In such a way, we **can draw** infinite number of **circles** passing **through two points**.

## How many circles can be drawn through a single point?

Question: **How many circles can be drawn** passing **through one** given **point** . Answer: We **can draw** infinitely **many circles** passing **through one** given **point**.

## How many circles can be drawn through four points?

Answer. infinite **circles can be drawn through** the **four** vertices of a rectangle.

## How many circles can be drawn from three points?

one circle

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