Area & Perimeter
What is the formula for area?
Area = Length x Width
Turn .20 into a fraction
20/100
42 x 59 =
2478
354 +807 =
1,161
What is an obtuse angle?
an angle that is greater than 90°
Which one would you NOT use the area formula on?
A) measuring the grass in flower bed.
B) measuring how much paint you need to paint a wall.
C) measuring how much wood you need to build a fence.
D) Measuring the amount of carpet you need for a room.
C. To figure out how much wood you need to build a fence you need to use perimeter.
Turn 79/100 into a decimal
.79
146 x 8
1,168
735 - 644 =
91
How many degrees is a straight angle?
180°
Find the perimeter of rectangular garden that is 34 feet long and 16 feet wide.
P= 2L=2W
P = 34+34+16+16 = 100
which fraction is smallest?
a) 2/3
b) 5/10
c) 18/20
d) 4/9
4/9
2/3 is close to 1
5/10 = 1/2
18/20 is close to 1
4/9 is less than half
974 x 12 =
11,688
456 + 2.4 =
458.4
If you add all 3 angles of a triangle together what is your total?
180°
If the area of a rug is 42 feet. The length is 7 feet. What is the width of it's?
6 feet
Area = L x W Area = 42 feet
42=7x?
7x 6 =42
Which fraction is NOT greater than 1/2
a) 4/6
b) 8/18
c) 7/10
d) 14/26
B
578 x 38 =
21,964
346.8 - 0.34 =
346.46
Find the missing angle A.
Angle B is 37°, Angle C is 115°,
A = 28°
115+37 = 152
180 - 152 = 28
Ms. Jonas wants to build a picture frame for her new picture of Marley. The picture is 18 inches by 20 inches.
What is the area of the picture of Marley?
How much wood does she need to build the frame?
Area =LxW
18x20 = 360 inches
Perimeter = 2L x 2W or L+L+W+W
18+18+20+20 =76 inches
Which fraction is larger?
15/20 or 5/12
15/20
15/20 is close to 1 whole
5/12 is close to 1/2
5423 x 2000 =
10,846,000
9000 -1780 =
7,220
I have a right triangle and one of it's angle is 26° degrees. How many degrees is the other angle?
64°
180°-90° = 90°
90° - 26° = 64°