Angles

Revision of Angles at GCSE level

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  • Created by: Parisa
  • Created on: 26-07-12 11:28

Angles

- There are acute, obtuse, reflex angles as well as right angles and angles on straight lines and around a point.

- Sum of angles inside a triangle is 180 and inside a quad is 360.

- Sum of interior angles in a polygon with n sides is 180(n-2).

- Sum of exterior angles in any polygon is always 360.

- Regular polygons have equal sides, equal interior/exterior angles.

- When parallel lines are crossed there are 4 equal acute angles and 4 equal obtuse angels at the points of intersection.

- Corresponding angles are equal and form a F shape together.

- Alternate angles are equal and form a z shape together.

- Opposite angles are equal and form an x shape together

- Bearings are measured clockwise from the north of the centre point.

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