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Shape angle-revision-hints
The document discusses various aspects of angles, including their classifications and properties, such as complementary, opposite, and angles in polygons. It outlines concepts related to compass points, supplementary angles, and the calculation of interior and exterior angles for different types of polygons. Additionally, it covers the relationships and formulas associated with angles in geometric figures.
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Shape angle-revision-hints
- 1. Names for angles < 90 = 90 90 < a < 180 180 < a < 360
- 2. Compass points andbearings North 000 West East 270 090 South 180
- 3. Angles at apoint
- 4. Angles on aline
- 5.
- 6.
- 7.
- 8.
- 9. Parallel lines: Alliedangles
- 10. Angles in atriangle
- 11.
- 12. Angles in aquadrilateral
- 13.
- 14. Interior and exteriorangles Also called external and internal angles
- 15. Polygons Triangle Rectangle Irregular Pentagon Hexagon Heptagon Octagon Nonagon Regular Decagon
- 16. Exterior angles ofa polygon Regular Irregular e e = 360 n Exterior angles Exterior angle add to 360 must be factor of 360
- 17. Interior angles ofa polygon Regular i e (n – 2) ×180 Total i= internal = (n – 2) ×180 n angle i = 180 - e
- 18.