In this article we will cover the topics of “Types of angles” and “Angle at intersection of lines”.

An angle is formed when two lines meet at a point or cross each other. When 2 lines meet normally 2 angles are formed internal and exterior angle. When 2 lines cross each other normally 4 angles are formed and 2 pairs are vertically opposite each other.

In the diagram : Angle at Intersection : angle b = d is equal, a = c is equal

Also sum of all the angles at the point : a + b + c + d = 360^{o}

The angles formed when a transverse line cuts two parallel line.

1. The corresponding angles are congruent. a = e, b = f, d = h, e = g.

2. Alternate angles are congruent , g = d, h = c,

3. Interior angles on the same side are supplementary – h+d = g + c = 180^{o}

4. The sum of opposite internal angles is h +c = g + d = 180^{o}

If you liked my contribution, please donate or click on any of advt. a little that will be generated will all be donated for noble cause. [paypal-donation]