Area
What is the Area Equation?
A= Pi radius squared
What is the equation of circumference?
C= Pi diameter
An inscribed angle is an angle with its vertex on the circle with two sides that are ______.
Chords
What is a central angle?
An angle with a vertex at the center, and two sides that are radii
minor arc
An arc with a measure greater than 180°
What is the area of a circle with a radius of 12m?
A) 453m squared
B) 452.39m squared
C) 144m squared
D) 363.12m squared
B) 452.39m squared
A= 12^2 pi
A= 144 pi
A= 452.39m squared
What is circumference of a circle with a diameter of 7mm?
A) 116 yd
B) 182.21 yd
C) 14.67 yd
D) 27.86 yd
B) 182.2 yd
C= Pi 58
C= 182.2 yd
Find m DGF
m DGF= 226°
Find m JKL
chord
A segment with endpoints on the circle.
What is the area of a circle with a radius of 2.8?
A) 21.7 ft squared
B) 7.84 ft squared
C) 32 ft squared
D) 24.63 ft squared
D) 24.63 ft squared
A= 2.8^2 pi
A= 7.84 Pi
A= 24.63 ft squared
What is the circumference of a circle with a diameter of 10 m?
A)
B)
C)
D) 31.42 m
D) 31.42 m
C= Pi 10
C= 31.42m
Find m BC
m BC= 86°
Find m IGJ
m IGJ= 150°
Point of Tangency
The point at which the tangent line intersects the circle
What is the area of a circle with a diameter of 18 in?
A) 254.47 in squared
B) 81.78 in squared
C) 527 in squared
D) 81 in squared
A) 254.47 in squared
R=18/2=9
A=9^2 pi
A=81 pi
A= 254.47 in squared
What is the circumference of a circle with a radius of 7mm?
A) 32 mm
B) 14.86 mm
C) 43.98 mm
D) 49 mm
C) 43.98 mm
D= 7*2=14
C=Pi 14
C= 43.98 mm
Solve for x
X= 3
Find m BCD
m BCD= 142°
Secant
A line that intersects the circle in two place
What is the area of a circle with a diameter of 35 km?
A) 962.11 km squared
B) 269.2 km squared
C) 70.18 km squared
D) 194.6 km squared
A) 962.11 km squared
R=35/2=17.5
A= 17.5 Pi squared
A= 306.25 pi
A= 962.11 km squared
Find the circumference of a circle with an area of 289 pi mm squared?
A) 335.57 mm
B) 289 mm
C) 106.8 mm
D) 359.7 mm
C) 106.8 mm
Square root of 289= square root of r^2
17=r
34= d
C=34 pi
C= 106.8 mm
If m FGH= (6x+21) and m FJH= (17x-28)
Find m FJH
m FJH= 210°
If angle FCG= angle DCE, Find x
X= 80°
Tangent
A line that intersects the circle at exactly one place