A secant is a line that intersects a circle at two points. For example, $$ ar{GI} $$ is a secant.

What is the circumference of a circle?

The circumference is the distance around the circle, calculated as $$ C = 2\text{π}r $$ , where 'r' is the radius.

What is the area of a circle?

The area is the space contained within the circle, calculated as $$ A = \text{π}r^2 $$ .

What is an arc in a circle?

An arc is a portion of the circumference of a circle.

What is a sector of a circle?

A sector is a region enclosed by two radii and the arc between them.

What is a segment of a circle?

A segment is a region of a circle bounded by a chord and the arc connecting its endpoints.

What is the relationship between a radius and a diameter?

The diameter is twice the length of the radius. If the radius is 'r', then the diameter is '2r'.

What is the formula for the length of an arc?

The length of an arc can be calculated using the formula $$ L = \frac{\theta}{360} \times C $$ , where 'C' is the circumference and 'θ' is the central angle in degrees.

What is the relationship between a tangent and a radius?

A tangent to a circle is perpendicular to the radius drawn to the point of tangency.

Parts of a Circle Flashcards

Student preview

15 questions

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1.

FLASHCARD QUESTION

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. It is often denoted by a letter, such as 'K'.

2.

FLASHCARD QUESTION

Front

What is a chord in a circle?

Back

3.

FLASHCARD QUESTION

Front

What is a central angle?

Back

4.

FLASHCARD QUESTION

Front

What is a secant?

Back

5.

FLASHCARD QUESTION

Front

What is a tangent?

Back

A tangent is a line that touches the circle at exactly one point, known as the point of tangency.

6.

FLASHCARD QUESTION

Front

What is the radius of a circle?

Back

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

7.

FLASHCARD QUESTION

Front

What is the diameter of a circle?

Back

The diameter is a chord that passes through the center of the circle and is twice the length of the radius.

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