If you can learn the following rules then you’re life is going to a lot easier….well….at least during your maths exam.

**Angles In A Triangle Add Up To 180°**So angles A + B + C = 180°**The Exterior Angle Of A Triangle Equals The Sum Of The Opposite Interior Angles**So angle D = A + C**Angles On A Straight Line Add Up To 180°**So A + B + C = 180°**Angles In a Quadrilateral (4 Sided Shape) Add Up To 360°**So here x must be 100°**Angles Around A Point Ad Up To 360°**

So a + b + c = 360°**Isosceles Triangles Have 2 Sides And 2 Angles The Same**The two dashes show the two sides are the same length.

The angles marked are the same.