Circle Theorem Formulas Part A

What formula would you use to find arc length? (length of AB)

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What formula would you use to solve for x?

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Circumference of a Circle

• C=πr²
• C=2πr
• C=2π

Area of a Circle

• A=x²
• A=πr²
• A=π²

Sine = 

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

Cosine 

• cosθ = adjacent / hypotenuse
• cosθ = opposite / hypotenuse
• cosθ = hypotenuse / adjacent

Tangent

• tanθ = adjacent / opposite
• tanθ = opposite / adjacent
• tanθ = hypotenuse / opposite

Pythagorean Theorem (Right Angle) 

• a²  + b² = c^{4
  (3,4,5)
  (6, 8 10)
  (5, 12, 13)}
• a² + b² = c^{2
  (3,4,5)
  (6, 8, 10)
  (5, 12, 13)}

• =Circumference

• =Area of a Circle

• =Volume of a Sphere

• =Equation of a Circle

• =Circumference

• =Area of a Circle

• =Volume of a Sphere

• =Equation of a Circle