Equations of Circles Part 1 (Pre-AP)

What does the 'HK' in the standard form equation of a circle represent?

• The diameter of the circle

• The area of the circle

• The center of the circle

• The circumference of the circle

Tags

CCSS.HSG.GPE.A.1

How do you find the radius of a circle from its equation?

• Multiply HK by 2

• Add the x and y coordinates of the center

• Take the square root of the constant term

• Divide the diameter by 2

Tags

CCSS.7.G.B.4

What is the formula for the circumference of a circle?

• 2 * PI * radius

• PI * diameter

• 2 * radius

• radius * radius * PI

Tags

CCSS.HSG.GPE.A.1

What is the purpose of completing the square in circle equations?

• To find the area of the circle

• To determine the center and radius

• To simplify the equation

• To calculate the diameter

Tags

CCSS.HSG.GPE.A.1

If the equation of a circle is x^2 + y^2 + 6x - 4y - 3 = 0, what is the first step in converting it to standard form?

• Square the coefficients of x and y

• Move the constant to the right side of the equation

• Group the x terms and y terms together

• Factor out the x and y terms

Tags

CCSS.HSG.GPE.A.1