Circumference
Area of a Circle
Cross Sections
Area of Composite Figures
100
How do I find circumference if I am given a RADIUS? (what is the formula that I will use?)
C = 2*pi*r
100
What is the formula to find area of a circle?
A = pi * r^2
A = pi * r * r
100
If I cut a cone VERTICALLY, what shape will I get?
a triangle!
100
What is the formula for a triangle? Rectangle?
Area of a triangle: A =
1/2 * b * h
Area of a rectangle: A = L * W
200
How do I find circumference if I am given a DIAMETER? (what is the formula that I will use?)
C = pi * d
200
A circle has a radius of 16 units. What is the area in square units of the circle in terms of π?
256pi
200
If I cut a cylinder HORIZONTALLY, what shape will I get?
a circle!
200
Luke buys a rug for his hallway as shown.
What is the area of the rug? Use 3.14 for π.
54.28
ft^2
300
The Sarsen Circle at Stonehenge has a circumference of 304.7 feet. What is the radius in feet of the Sarsen Circle in terms of pi? Round to the nearest hundredth.
48.52 feet
300
What is the difference between circumference and area?
Circumference is the distance AROUND the circle
Area if the distance within the circle
300
A jeweler cuts a cylindrical bead parallel to the bases, as shown.
What is the circumference of a horizontal cross section of the bead rounded to the nearest whole number? Use 3.14 for π.
38 mm
300
What is the area of the figure in square meters?
41
m^2
400
A circle has a diameter of 42 inches. What is the circumference of the circle? Use 22/7 for
pi
132 inches
400
Mila cuts a sphere with a 13-inch radius in half. What is the area of the cross section of the sphere in square inches in terms of pi?
530.66 square inches
400
BRAIN BREAK TRIVIA!!!
What was the first state?
Delaware
400
BRAIN BREAK TRIVIA!!!
How many bones do sharks have in their bodies?
None!!
500
Madison is putting fabric squares around her circular mirror. Each fabric square is 1 cm long.
How many fabric squares will Madison need? Use 3.14 for π.
88
500
DOUBLE POINTS!!!!!
Jack found an antique coin as shown. The coin is circular in shape with a square cut from the center.
PART 1) What is the area of the cutout in the coin in square millimeters?
PART 2) What is the area of the coin rounded to the nearest square millimeter? Use 3.14 for π.
PART 1) 9 square millimeters
PART 2) 293 square millimeters
500
BRAIN BREAK TRIVIA!!!!
Which is the highest waterfall in the world?
1) Angel Falls, Venezuela
2) Niagara Falls, USA/Canada
3) Iguazu Falls, Argentina/Brazil
Angel Falls, Venezuela
500
BRAIN BREAK TRIVIA!!!
How many hearts does an octopus have?
Three