Math 90: Geometry

Triangles

  • Area: 1/2bh
  • Perimeter: a + b + c
  • Isosceles: Perimeter: 2a + 1
  • Equilateral: Perimeter: 3a

Squares:

  • Area: L * W
  • Perimeter: 4s

Rectangles:

  • Area: L * W
  • Perimeter: 2L + 2W

Types of Angles

  • Right
  • Acute
  • Obtuse
  • Complimentary
  • Supplementary
  • Zero
  • Reflex Angles
  • Vertical Angel
  • Corresponding Angles
  • Alternate Interior Angles
  • Alternate Exterior Angles

The Angles in a Triangle add up to 180 degrees

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