Download - Act math area - perimeter
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ACT Math Formulas
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What is the area of a square?
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Side X Side or Side Squared
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Side X Side or Side Squared
side
side
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What is the area of this square?
5
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5 x 5 = 25
5
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What is the area of this square?
10
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10 x 10 = 100
10
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What is the area of a rectangle?
![Page 10: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/10.jpg)
Length X Width = Area
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Length X Width = Area
Width
length
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What is the area of this rectangle?
3
7
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3 x 7 = 21
3
7
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What is the area of this rectangle?
10
12
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10 x 12 = 120
10
12
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What is the area of a triangle?
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½ (base x height) = area of triangle
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½ (base x height) = area of triangle
Base
Height
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What is the area of this triangle
5
10
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½ (5 x 10) = ½ (50) = 25
5
10
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½ (5 x 10) = ½ (50) = 25
5
10
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½ (5 x 10) = ½ (50) = 25
5
10
![Page 23: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/23.jpg)
What is the area of this triangle
7
10
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½ (7 x 10) = ½ (70) = 35
7
10
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½ (7 x 10) = ½ (70) = 35
7
10
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½ (7 x 10) = ½ (70) = 35
7
10
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What is the PERIMETER of a square?
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Side+Side+Side+Side OR 4 x Side
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Side+Side+Side+Side OR 4 x Side
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Side+Side+Side+Side OR 4 x Side
side
side
side
side
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What is the perimeter of this square?
5
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5+5+5+5 OR 4 x 5 = 20
5
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5+5+5+5 OR 4 x 5 = 20
5
![Page 34: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/34.jpg)
5+5+5+5 OR 4 x 5 = 20
5
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What is the perimeter of this square?
10
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10+10+10+10 OR 4 x 10 = 40
10
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10+10+10+10 OR 4 x 10 = 40
10
![Page 38: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/38.jpg)
10+10+10+10 OR 4 x 10 = 40
10
![Page 39: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/39.jpg)
What is the PERIMETER of a rectangle?
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(2 x Length) + (2 x Width)
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(2 x Length) + (2 x Width)
width
length
width
length
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What is the perimeter of this rectangle?
4
7
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2 (7) + 2 (4)
4
7
7
4
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14 + 8
4
7
7
4
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14 + 8 = 22
4
7
7
4
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What is the perimeter of this rectangle?
6
9
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2 (9) + 2 (6)
6
9
9
6
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18 + 12
6
9
9
6
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18 + 12 = 30
6
9
9
6
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What is the CIRCUMFERENCE of a circle?
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2𝜋𝑟
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2𝜋𝑟
![Page 53: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/53.jpg)
What is the circumference of this circle?
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= =
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= =
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= =
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= =
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= =
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= =
Circumference or perimeter of this circle equals 31.4
![Page 60: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/60.jpg)
What is the circumference of this circle?
![Page 61: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/61.jpg)
= =
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= =
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= =
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= =
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= =
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Circumference or perimeter of this circle equals 314
= =
50
![Page 67: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/67.jpg)
What is the area of a circle?
![Page 68: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/68.jpg)
What is the area of a circle?
A = pr2
![Page 69: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/69.jpg)
What is the area of a circle?
A = p102
10
![Page 70: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/70.jpg)
What is the area of a circle?
A = p100
10
![Page 71: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/71.jpg)
What is the area of a circle?
A = 3.14 * 100
10
![Page 72: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/72.jpg)
What is the area of a circle?
A = 314
10
![Page 73: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/73.jpg)
What is the area of a circle?
![Page 74: Act math area - perimeter](https://reader035.vdocuments.site/reader035/viewer/2022062308/5591a2501a28ab9f268b4788/html5/thumbnails/74.jpg)
What is the area of a circle?
A = pr2