ACT Math Test Essential Knowledge. Area of a Circle.
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Transcript of ACT Math Test Essential Knowledge. Area of a Circle.
![Page 1: ACT Math Test Essential Knowledge. Area of a Circle.](https://reader035.fdocuments.us/reader035/viewer/2022072013/56649e6b5503460f94b69816/html5/thumbnails/1.jpg)
ACT Math Test Essential Knowledge
![Page 2: ACT Math Test Essential Knowledge. Area of a Circle.](https://reader035.fdocuments.us/reader035/viewer/2022072013/56649e6b5503460f94b69816/html5/thumbnails/2.jpg)
Area of a Circle
![Page 3: ACT Math Test Essential Knowledge. Area of a Circle.](https://reader035.fdocuments.us/reader035/viewer/2022072013/56649e6b5503460f94b69816/html5/thumbnails/3.jpg)
Circumference of a Circle
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Area of a Triangle
½ b·h
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Area of a Rectangle
b·h
![Page 6: ACT Math Test Essential Knowledge. Area of a Circle.](https://reader035.fdocuments.us/reader035/viewer/2022072013/56649e6b5503460f94b69816/html5/thumbnails/6.jpg)
Perimeter
= Sum of all sides
Example: Perimeter of Rectangle = 2b + 2h
![Page 7: ACT Math Test Essential Knowledge. Area of a Circle.](https://reader035.fdocuments.us/reader035/viewer/2022072013/56649e6b5503460f94b69816/html5/thumbnails/7.jpg)
Area of a Trapezoid
½ (b1+b2)·h
![Page 8: ACT Math Test Essential Knowledge. Area of a Circle.](https://reader035.fdocuments.us/reader035/viewer/2022072013/56649e6b5503460f94b69816/html5/thumbnails/8.jpg)
Slope Formula
m = y2-y1
x2-x1
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Slope-Intercept Equation of a Line
y = mx + b
![Page 10: ACT Math Test Essential Knowledge. Area of a Circle.](https://reader035.fdocuments.us/reader035/viewer/2022072013/56649e6b5503460f94b69816/html5/thumbnails/10.jpg)
Distance Formula
D = √w
![Page 11: ACT Math Test Essential Knowledge. Area of a Circle.](https://reader035.fdocuments.us/reader035/viewer/2022072013/56649e6b5503460f94b69816/html5/thumbnails/11.jpg)
Midpoint Formula
M= x1+x2 y1+y2
2 , 2
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Pythagorean Theorem
a2 + b2 = c2
![Page 13: ACT Math Test Essential Knowledge. Area of a Circle.](https://reader035.fdocuments.us/reader035/viewer/2022072013/56649e6b5503460f94b69816/html5/thumbnails/13.jpg)
Trig Rations
sin = opposite
hypotenuse
cos = adjacent
hypotenuse
tan = opposite
adjacent
******Remember: SOH-CAH-TOA
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Special Right Triangles
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Mean
= sum of terms
number of terms
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Median
Middle term in an ordered data set
(If there is an even number of terms, take the average of the two middle terms.)
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Mode
Most frequently occurring term
in a data set