Circles Vocab
What is a circle?
A shape made out of al the points that are the same distance from the center.
Find the circumference of the circle below. Use 3.14 as the approximation for π.
-2cm for diameter
Answer:
2 x 3.14 = 6.28cm
Find the area of this circle. Use 3.14 as the aproximation of pi.
Diameter- 20m
r=10m
A= 3.14 x 10m2
Answer A=314m2
What is a chord?
A segment that has one endpoint at the center and the both endpoint on the circle.
Which direction does the sun rise from?
The East
What is the radius?
A segment that has one endpoint at center and has both endpoints on the circle.
Find the circumference of the circle below.
-Radius is 15m
r=15m
d=30m
C=πd
C=3.14x30
Answer C=94.2m
Find the area of the circle below.
radius=5mm
r=5mm
A=3.14x25
Answer A= 78.5mm2
What is a semicircle?
Half of the diameter
hat is the name of the toy cowboy in Toy Story?
Sheriff Woody
What is the diameter?
A segment that passes though the center and has bothedpoints on the circle
What is the circumference of a circle with a radius of 4.5mm?
r=4.5mm
d=9mm
C=πd
C=3.14x9
Answer C=28.26mm
What is the area of the circle with a radius of 1.2mm?
r=1.2mm
A=3.14x1.44
Answer A= 4.52mm2
What is an Arc?
Part of a circle.
Which planet is known as the "Blue Planet"?
Neptune
What is the circumference?
The distance around the outside of a circle.
What is the circumference of a circle with a diameter of 150mm?
r=75mm
d=150mm
C=πd
C=3.14x150
Answer C=471mm
What is the area of the circle with a radius of 11cm?
r=11cm
A=3.14x121
Answer A=379.94cm2
What is a Central Angle?
An angle with its vertex at the center of a circle.
How many bones are in the human body?
206 bones
What is the area?
The amount of space inside a circle.
Rebecca is planting bushes around the perimeter of her circular garden. If the diameter of her garden is 12 feet, how many feet of bushes will she need to go around the outside of the garden?
d=12
C=3.14x12
Answer C=37.68 ft
What is the area of the circle with a diameter of 12in?
r=6 in
A=3.14x36
Answer A=113.04 in2
Ryan constructed a circular table top. It has a diameter of 8.5 feet. What is the area of the table top?
r=4.25ft
A=3.14x18.0625
Answer= 56.70ft2
What is the chemical symbol for the element gold?
Au