Geometery

• Complementary Angles are two angles with sizes that add to 90 degrees.
• Vertically Opposite Angles will be equal.
• When two parallel lines are cut by a third line, angles in alternate positions are equal in size.
• Co-interior or Allied Angles are when two parallel lines are cut by a third line, co-interior angles are supplementary.
• quadrilateral: a four-sided figure.
• pentagon: a five-sided figure
• hexagon: a six-sided figure
• heptagon: a seven-sided figure
• Equilateral - all sides have the same length
• Isosceles - two sides have the same length
• Scalene - no sides have the same length
• Volume of a sphere:

  𝑉 = 4·π·𝑟3 /3
• Area of a trapezoid:

  𝐴 = 𝑎+𝑏 · h

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