ACT Prep 2022 exam review
Circumference of a circle - 2πr
Area of a triangle - A=(base x height)/2
Area of a trapezoid - A=(base 1 + base 2)/2 x height
phythagorean theorem - a^2 + b^2 = c^2
area of a circle - A=πr²
Volume of a cylinder - V=πr²h
sector - fraction of area of circle
x/aπ = 45/360
x/aπ = 1/8
8x = aπ
x=a/8 π
arc - fraction of circumference
, ACT Prep 2022 exam review
x/aπ = 45/360
x/aπ = 1/8
8x = aπ
x = 3/4 π
area of a parallelogram - A=bh
Volume of a sphere - 4/3πr³
equation of a circle - (x-h)²+(y-k)²=r²
(h,k) = center
radians to degrees - multiply by 180/π
eg: 3π/2 x 180/π=270 degrees
degrees to radians - multiply by π/180
270 x π/180=3π/2
sin - sine= opposite/hypotenuse
Circumference of a circle - 2πr
Area of a triangle - A=(base x height)/2
Area of a trapezoid - A=(base 1 + base 2)/2 x height
phythagorean theorem - a^2 + b^2 = c^2
area of a circle - A=πr²
Volume of a cylinder - V=πr²h
sector - fraction of area of circle
x/aπ = 45/360
x/aπ = 1/8
8x = aπ
x=a/8 π
arc - fraction of circumference
, ACT Prep 2022 exam review
x/aπ = 45/360
x/aπ = 1/8
8x = aπ
x = 3/4 π
area of a parallelogram - A=bh
Volume of a sphere - 4/3πr³
equation of a circle - (x-h)²+(y-k)²=r²
(h,k) = center
radians to degrees - multiply by 180/π
eg: 3π/2 x 180/π=270 degrees
degrees to radians - multiply by π/180
270 x π/180=3π/2
sin - sine= opposite/hypotenuse
