Angles
 1 Year = 360 Days (approximately)
 This is the time that it takes for the Earth to rotate around the Sun.
 1 Turn = 360 Degrees = 4 Right Angles
 Half Turn = 180 Degrees = a Straight Angle
 PROTRACTOR : the instrument that is used to draw and measure angles.
 Where 2 Straight Lines cross, Vertical Angles are equal
 The sum of Supplementary angles is 180 degrees. (definition)
 The sum of Complementary angels is 90 degrees. (definition)
 An acute angle is < 90 degrees.
 An Obtuse angle is > than 90 degrees, but less than 180 degrees
 90 degrees < Obtuse angle < 180 degrees.

Parallel Lines (Geometry Part 1, Unit 2, Lesson 6)

Triangles

Quadrilaterals
 Rectangle
 Parallelogram
 Rhombus
 Kite
 Trapezium

Circles

Polygons
 A regular Polygon has all its sides equal.
 To find the sum of the interior angles of a Polygon,
 divide the polygon into triangles and count how many there are, then
 multiply the number of triangles by 180 degrees.
 The sum of the External Angles of a Polygon = 360 Degrees.
 Names:
 3 sides  Triangle
 4 sides  Quadrilateral
 5 sides  Pentagon
 6 sides  Hexagon
 7 sides  Heptagon
 8 sides  Octagon
