UNIT 8 REVIEW CIRCLES

Front

What is the measure of angle ACB in a circle if it is given as 22.5°?

Back

m∠ACB = 22.5°

Front

What is the formula to find the diameter of a circle given its circumference?

Back

d = C/π

Front

If the circumference of a circle is 45π cm, what is the diameter?

Back

d = 45 cm

Front

What is the area of a shaded sector in terms of π if it is given as 3757π/72?

Back

Area of shaded sector = 3757π/72

Front

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

Back

(x - h)² + (y - k)² = r²

Front

In the equation (x-3)²+(y-2)²=16, what is the center of the circle?

Back

Center = (3, 2)

Front

How do you find the radius of a circle from its equation (x - 2)² + (y + 3)² = 25?

Back

Radius = √25 = 5

Front

What is the equation of a circle with center (2, -3) and radius 5?

Back

(x - 2)² + (y + 3)² = 25

Front

If a circle has a radius of 7 cm, what is its circumference?

Back

C = 2πr = 14π cm

Front

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

Back

Diameter = 2 × Radius