Circumference & Area
What are the circumference and area formulas?
2(pi)r and (pi)r^2
What would you call a line segment that passes through the center and has endpoints on the outer edge of the circle?
Diameter
What are central and inscribed angles?
A central angle has the vertex at the center of the circle, and an inscribed angle has a vertex on the outer edge of a circle.
what are the formulas for arc length and area of a sector
(theta)/360 * 2(pi)r
and
(theta)/360 * (pi)r^2
what are h and k in the circle equation
center point of the circle
find the circumference of a circle with a diameter of 8.
25.1
What do you call a line that touches a circle at only one point?
Tangent
What is the measure of central and inscribed angles?
central angles are the same as the arc and inscribed angles are half of the arc.
Find the arc length
See question 4
7.7
what is the equation of a circle
(x-h)^2+(y-k)^2=r^2
Find the area of a circle with a radius of 3.
28.3
Draw a chord.
(segment in a circle with endpoints on the outer edge that does not pass through the center)
see question 1.
51 degrees
Find the are of the sector
see question 4
15.4
what is the center of a circle with the equation
(x-2)^2 + (y+7)^2 = 4
(2, -7)
Find the area of a circle with a diameter of 12.
113.1
How is a circle named?
the center point
see question 2
60 degrees
find the arc length
see question 5
9.4
what is the equation of the circle
see question 7
(x+2)^2 + (y-2)^2 = 9
What is the radius of a circle that has a circumference of 12.6?
2
Explain a minor and major arc.
A major arc is more than 180 degrees and a minor arc is less than 180 degrees.
see question 3
124
find the area of the sector
see question 5
42.4
what is the equation of the circle
see question 6
(x+1)^2 + (y+2)^2 = 25