**Plane Geometry** is the new topic added in the new syllabus. There are hardly any calculations but lots of proving to be done.

We know students dislike proving, be it in **Plane Geometry**, **Trigonometry**, **Quadratic Equations**, **Differentiation** . . .

To score As in your exam, you must be good in proving.

**Plane Geometry** has proven to be a challenging topic for many students due to the nature of the diagrams, questions. Many a times, students do not know when to begin, not to mention which theorems to apply. I am going to share with you in this post on the **key concepts **you need to know at your fingertips for Plane Geometry.

There are 2 basic shapes in **Plane Geometry**: Triangle & Circle

**In Triangle,**

- You must know the different
**Congruency Tests & Similarity Tests.**These are extremely important in proving plane geometry questions. Teachers did not emphasize on this as students are expected to know these concepts well from E-Math. But I realize many many students did not like Congruency & Similarity as it involves proving (which is a very systematic approach of thinking) and hence many did not understand these 2 concepts well. **Mid point theorem**(This is not exactly your mid point formulae in Co-ordinate Geometry)**Intercept theorem**

D and E are the midpoints of AC and AB respectively.

When DE//CB, AD/DC = AE/EB

I will be adding on specific properties for circle in my next post. If you like to be updated, subscribe to my feed by clicking HERE