What is the formula to find the area of a circle?

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

What is a central angle in a circle?

A central angle is an angle whose vertex is at the center of the circle and whose sides are radii.

What is the relationship between the radius and the circumference?

The circumference can be calculated using the radius with the formula $$C = 2 \times \text{π} \times r$$ .

What is the relationship between the diameter and the circumference?

The circumference can also be calculated using the diameter with the formula $$C = \text{π} \times d$$ .

What is a semicircle?

A semicircle is half of a circle, formed by a diameter and the arc connecting its endpoints.

What is the measure of a full circle in degrees?

A full circle measures 360 degrees.

What is the measure of a right angle in a circle?

A right angle measures 90 degrees.

FA 3.1 Parts of a circle Flashcards

Student preview

15 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is a chord in a circle?

Back

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

2.

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 the longest chord.

3.

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.

4.

FLASHCARD QUESTION

Front

How is the radius related to the diameter?

Back

5.

FLASHCARD QUESTION

Front

What is the center of a circle?

Back

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

6.

FLASHCARD QUESTION

Front

What is an arc in a circle?

Back

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

7.

FLASHCARD QUESTION

Front

What is the circumference of a circle?

Back

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