Angles

Reasons for angles:

• All angles on a straight line add up to 180 degrees.
• Angles around a point add up to 360 degrees.
• Opposite angles are equal.
• Corrosponding angles are equal.
• Alternate angles are equal.
• Angles in a triangle add up to 180 degrees.
• Angles in a quadrilateral add up to 360 degrees.
• Base angles of an isosceles triangle are equal.

formulae for polygon- (n = number of sides of the shape)

sum of interior angles= 180 x (n-2)

sum of exterior angles = 360 degrees.

In a regular polygon all the sides are equal and all the angles are…