Circles
What is the formula for circumference of a circle?
C= pi x d
3.14 x diameter
What is the formula for area of a rectangle?
A = bh
Area = base X height
Find the number that makes the ratio equivalent to
1:7
9:__
9 : 63
-6 x ___ = -42
7
9t = 36
t = 4
The diameter of a circle is 4 inches. What is the circle's circumference?
C= pi x d
12.56 inches
A square patch of grass has sides that are 5 meters long. What is the patch's area?
25 square meters
5 x 5
Find the number that makes the ratio equivalent to
6:8
___ : 72
54 : 72
____ / -4 = 6
-24
j + 5 = 73
j =68
The radius of a circle is 3 millimeters. What is the circle's area?
A= pi X radius (squared)
28.26 millimeters squared
What is the formula for area of a triangle
A = 1/2bh
area= 1/2 X base X height
Find the number that makes the ratio equivalent to
6:4
48 : ___
48 : 32
Connor is playing a card game called At Face Value. At the end of each round, players earn positive points for their remaining number cards but negative points for their face cards. At the end of round 1, Connor earns 5 points. At the end of round 2, he earns 6 points. What is Connor's score now?
-11
-5 + -6 = -11
34 = s − 36
s = 70
The radius of a circle is 6 kilometers. What is the circle's circumference?
C = pi x d
37.68 kilometers
6 + 6 = 12 (diameter)
c = 3.14 x 12
The surface of a pool table is 3 feet wide and 8 feet long. What is its area?
24 square feet
8 X 3 = 24
Every summer, Kendra plants a vegetable garden in her yard. Last year, she planted 6 rows of tomatoes and 8 rows of peppers. Kendra wants to keep the same ratio this year, but she only plans to plant 3 rows of tomatoes.
How many rows of peppers will Kendra plant this year?
4 rows of peppers
A trout was swimming 9 feet below the surface of a lake. It dove down 8 more feet to search for food. What is the position of the trout now relative to the surface?
-17
-9 + -8 = -17
Write an equation for the problem AND solve it:
Patty works in a greenhouse. During her shift this morning, Patty watered some hydrangeas and 47 petunias. She watered a total of 83 plants. How many hydrangeas did she water?
h + 47 = 83
36 hydrangeas
The diameter of a circle is 8 inches. What is the circle's area?
A = pi X radius (squared)
50.24 inches squared
8 / 2 = 4 (radius)
A= 3.14 X 4 (squared)
100 + 100 + 65 + 65 =330
330 X 2 = 660 yards
On rainy days, Francesca likes to ride the stationary bike at the gym. Yesterday, she rode for 30 minutes and covered 6 miles. Today, she plans to ride 8 miles.
If she rides at the same rate, how many minutes will it take Francesca to ride today?
40 minutes
Ronnie is playing a card game called Subzero, where the goal is to get the lowest possible score. In the first round, Ronnie scored 6 points. In the second round, he scored 12 points. What is Ronnie's total score now?
-18 points
-6 + -12 = -18
Write an equation AND solve:
Josie's favorite board game is Into the Night. A new expansion pack was just released, which costs $19.14 after taxes. After buying the expansion pack, Josie had $25.86 left in her wallet.
How much money did Josie have to start?
m - 19.14 = 25.86
m=45