ACT MATH FORMULA REVIEW

Equation of a Circle

• (x - h)² + (y - k)² = r²
• x - h + (y - k)² = r
• (x - h)² + (y + k)² = r²

Tags

CCSS.HSG.GPE.A.1

Equation of a Line

• y = mx + b
• l = mb + x
• y = mb + x

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Circumference of a Circle

• C=πr²
• C=2πr
• C=2π

Tags

CCSS.7.G.B.4

Area of a Square

• A=rx2
• A=s²
• A=LxW

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Area of a Triangle

• A=bh⁄2
• A=b+h
• A=bxhx2

Tags

CCSS.6.G.A.1

Area of a Circle

• A=x²
• A=πr²
• A=π²

Tags

CCSS.7.G.B.4

Area of a Rectangle

• A=π²
• A=2xbxh
• A=lw or bh

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Area of a Trapezoid

• A= ½bh
• A=bh
• A=½ (b₁+b₂)h

Tags

CCSS.6.G.A.1

Area of a Parallelogram

• A=bh
• A=2bh
• A=b₂xh₂

Tags

CCSS.6.G.A.1

Sine = 

• sinθ = opposite / adjacent
• sinθ = adjacent / hypotenuse
• sinθ = opposite ∕ hypotenuse

Tags

CCSS.HSG.SRT.C.6