what is a circle's radius if it has a diameter of 4?
2
100
is a square a rectangle?
yes, but a rectangle is not necessarily a square
100
what is the perimeter of a triangle with a side of 3, 4, and 2?
P = s1 + s2 + s3 = 3 + 4 + 2 = 9
100
you want to build a fence around a rectangular garden that is 3 feet wide and 5 feet deep. How much fence do you need?
P = 2b + 2h = 2x3 + 2x5 = 6 + 10 = 16
200
what is circumference?
the distance around a circle
200
what is the equation for the circumference of a circle?
c=2pir
200
what is the perimeter of a rectangle with a base of 2 and a height of 3?
P = 2b + 2h = 2x2 + 2x3 = 4 + 6 = 10
200
what is the equation for the area of a triangle? and WHY? (relate to a rectangle!!!)
A = 1/2 bh because a triangle is half of a rectangle
200
You are paid to graffiti the side of a ramp for a grocery store. The ramp side is a triangle that is 5 feet high and has a base that is 8 feet. How much area do you have to graffiti?
A = 1/2 bh = 1/2 x 8 x 5 = 20
300
what is area?
the amount of space inside a 2d figure
300
what is the equation for the area of a circle?
A=pir^2
300
what is the area of a rectangle with the base of 3 and a height of 4?
A = bh = 3 x 4 = 12
300
what is the area of a triangle with a height of 3 and a base of 2?
A = 1/2 bh = 1/2 x 2 x 3 = 3
300
Your new rims for your car has a radius of 1 foot. How much tire do you need to cover your rims? (think circumference)
C = 2pir = 2 x 3.14 x 1 = 6.28 feet of tire.
400
what is radius
the distance from the center of a circle to its border
400
what is the circumference of a circle whose radius is 3?
C = 2 pi r
so C = 2 x 3.14 x 3 = 18.84
400
what is the perimeter of a rectangle with a base of 5 and a height of 3?
P = 2b + 2h = 2x5 + 2x3 = 10 + 6 = 16
400
what is the area of a triangle with a base of 10 and a height of 5?
A = 1/2 bh = 1/2 x 10 x 5 = 25
400
You order a 12 inch pizza. How much pizza are you actually getting? (12 inch means diameter)
A = pi r^2
Diameter= 2 x r so r = 1/2 diameter = 1/2 x 12 = 6
so A = 3.14 x 6 x 6 = 113.04 inches of pizza
500
what is pi?
the ratio of the circumference of a circle to its diameter
or
the ratio of a circle's area to its radius squared
or roughly 3.14
500
what is the area of a circle with a radius of 3?
A = pi r^2 = pi x r x r
so A = 3.14 x 3 x 3 =28.26
500
what is the area of a rectangle with a base of 10 and a height of 2?
A = bh = 10 x 2 = 20
500
what is the area of a triangle with a height of 4, a side of 3, and a base of 2?
A = 1/2 bh = 1/2 x 2 x 4 = 4
500
You are building a rectangular deck that is 6 feet wide and 8 feet across. How much wood do you need to buy?