Circles Test 2024

Front

What is the center of the circle in the equation (x-4)²+(y-3)²=25?

Back

(4, 3)

Front

What is the formula to calculate the circumference of a circle?

Back

Circumference = π × diameter

Front

If a circle has a diameter of 8 cm, what is its circumference?

Back

25.12 cm

Front

What is the relationship between the radius and diameter of a circle?

Back

Diameter = 2 × radius

Front

What is the diameter of a circle with a radius of 23 feet?

Back

46 feet

Front

Which segment represents a radius in a circle?

Back

A radius is any line segment from the center of the circle to a point on the circle.

Front

What is the standard equation of a circle with center (h, k) and radius r?

Back

(x-h)² + (y-k)² = r²

Front

What is the radius of a circle with the equation x² + y² = 9?

Back

3 (since radius r = √9)

Front

What does the term 'circumference' refer to in relation to a circle?

Back

Circumference is the distance around the circle.

Front

If the radius of a circle is doubled, what happens to the circumference?

Back

The circumference also doubles.