Angles

Angles

Parallel lines
1. Corresponding angles - are equal
2. Alternate angles - are equal
3. Allied angles - add up to 180 degrees
4. Transversal
5. Two lines that never meet
Polygons
1. Triangles - add up to 180 degrees
2. Quadrilaterals - add up to 360 derees
3. Interior angles
  1. Sum of interior angles - 180(n-2)
  2. 180 - exterior angle
4. Exterior angles
  1. 180 - interior angle
  2. always sum to 360 degrees
    1. Regular polygon - 360/n
Straight lines
1. Angles on a straight line add up to 180 degress
2. Angles at a point add up to 360 degrees
3. Vertically opposite angles are equal
Basic types of angles
1. Acute angle - less than 90 degrees
2. Obtuse angle - between 90 and 180 degrees
3. Right angle - 90 degrees
  1. Perpendicular
4. Straight line - 180 degrees
5. Reflex angle - over 180 degrees
6. Full turn - 360 degrees

Resource summary

	Created by Lou Collins over 11 years ago