Circle Terms
Where is the vertex of the central angle?
What is the equation of a circle whose center is (2,-1) and radius is 5?
(x-2)2 + (y+1)2 =25
The radius of a circular table is 4 ft. Find the circumference of the table in terms of pi.
What is 8 * pi ft
An arc that is less than 180 degrees.
What is minor?
If the measure of the central angle is 120o, what is the measure of its intercepted arc?
What is 120o?
What is the center of the circle whose equations is (x+3)2 + y2 = 23
(-3,0)
The diameter of a circular table is 6 ft. Find the approximate area.
What is 28.26 ft2?
Congruent chords create this type of arc.
What are congruent arcs?
A segment through the circle.
What is a chord?
If the intercepted arc is 50o, then what is the measure of it's inscribed angle?
What is 25o?
What is the diameter of the circle with an equation of x2 + y2 = 144?
24
The circumference of a classroom clock is 34.5 inches. Find the diameter of the clock. Round to the nearest whole number.
What is 11 inches?
If AB and CD are congruent chords, and chord AB=2x+5 and CD=15-3x, what is x?
What is 2?
What is the relationship between the central angle and the inscribed angle?
Is (6,3) on, inside, or outside a circle with an equation (x-2)2+(y-3)2=16
What is ON?
The radius of a semi-circle measures 6 units. Find its area.
What is 56.52 square units?
Two chords that are equidistant from the center are said to be this.
What is congruent?
A line that touches the circle at exactly one point.
What is a tangent line?
If the central angle of a circle is (4x+20)o and the inscribed angle is 40o, what is the value of x?
What is 15?
What is the equation of a circle with an Area=530.66 ft2 and center point (1, -3)?
What is (x-1)2+(x+3)2=169?
The area of a circle is 254.34 ft2. What is the circumference of the circle?
56.52 feet.
A chord is perpendicular to a radius of a circle. Suppose the chord is 5 m from the center of the circle. If the radius of the circle is 13 m, find the length of the chord.
What is 24 m?