math

• Legs

  The two sides which come together in a right angle
• Lengths of the legs

  Usually called a and b
• Hypotenuse

  The side across the right angle
• The hypotenuse is always called c
• Pythagorean Theorem

  • Proposed by Pythagoras of Samos
  • To find the missing side of a right triangle

  
• Pythagorean Formula

  1. c^2 = a^2 + b^2

  2. a^2 = c^2 - b^2

  3. b^2 = c^2 - a^2
• Trigonometry

  • A branch of Mathematics that studies triangles and the relationship between the lengths of their sides and the angles between those sides
  • Comes from the Greek words for TRIANGLE (TRIGANON) and MEASURE (METRON)

  
• Adjacent side

  The side next to the reference angle in a right triangle
• Opposite side


  The side across the reference angle in a right triangle
• Hypotenuse

  The longest side in a right triangle and always opposite to the 90° angle
• SOH-CAH-TOA

  • Sine (Opposite, Hypotenuse)
  • Cosine (Adjacent, Hypotenuse)
  • Tangent (Opposite, Adjacent)
• CHO-SHA-CAO

  • Cosecant (Hypotenuse, Opposite)
  • Secant (Hypotenuse, Adjacent)
  • Cotangent (Adjacent, Opposite)