What is the area of a circle?

The area of a circle is calculated using the formula $$A = \text{π} \times \text{radius}^2$$ .

What is a chord in a circle?

A chord is a line segment with both endpoints on the circle.

What is the relationship between the diameter and the circumference?

The circumference is equal to the diameter multiplied by π, expressed as $$C = \text{π} \times \text{diameter}$$ .

What is the center of a circle?

The center is the point that is equidistant from all points on the circumference.

What is a sector in a circle?

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

What is a tangent to a circle?

A tangent is a line that touches the circle at exactly one point.

What is the formula for the diameter if the radius is known?

The diameter can be calculated using the formula: $$\text{diameter} = 2 \times \text{radius}$$ .

What is the formula for the radius if the diameter is known?

The radius can be calculated using the formula: $$\text{radius} = \frac{\text{diameter}}{2}$$ .

Parts of a circle Flashcards

Student preview

15 questions

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1.

FLASHCARD QUESTION

Front

What is the diameter of a circle?

Back

The diameter is the distance across a circle through its center, and it is twice the length of the radius.

2.

FLASHCARD QUESTION

Front

What do we call a chord that passes through the center of the circle?

Back

A chord that passes through the center of the circle is called the diameter.

3.

FLASHCARD QUESTION

Front

What is the relationship between the radius and the diameter?

Back

The radius is half the diameter.

4.

FLASHCARD QUESTION

Front

If the radius of a circle is 4, what is the diameter?

Back

The diameter is 8, since diameter = 2 × radius.

5.

FLASHCARD QUESTION

Front

What is the circumference of a circle?

Back

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 its circumference.

7.

FLASHCARD QUESTION

Front

What is an arc in a circle?

Back

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

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