diff --git a/Grade 9/Math.md b/Grade 9/Math.md
index 78271d0..b3bbdb3 100644
--- a/Grade 9/Math.md
+++ b/Grade 9/Math.md
@@ -147,7 +147,7 @@
> ## Factoring
>>Two methods of solving; decomposition and criss-cross. First of all, the polynomial must be in the form of a quadratic
->> equation (ax2 + bx + c). As well, simplify the polynomial, so that all common factors are outside
+>> equation (ax2 + bx + c). As well, simplify the polynomial, so that all common factors are outside
>> (e.g 5x + 10 = 5(x + 2) ).
>> |Type of Polynomial|Definition|
@@ -269,13 +269,13 @@
> 8. ```Sum of The Interior Angle of a Polygon```
> - The sum of the interioir angles of any polygon is ```180(n-2)``` or ```180n - 360```, where ```n``` is the number of sides of the polygon
-
+>
> 9. ```Exterior Angles of a Convex Polygon```
> - The sum of the exterior angle of any convex polygon is always ```360 degrees```
-
+>
> ## Properties of Quadrilaterals
@@ -297,7 +297,7 @@
> ## 2D Geometry Equations
>> |Shape|Formula|Picture|
>> |:----|:------|:------|
->> |Rectangle|```Area```: lw
```Perimeter```: 2(l+w)|
|
+>> |Rectangle|```Area```: lw
```Perimeter```: 2(l+w)|
|
>> |Triangle|```Area```: bh/2
```Perimeter```: a+b+c|
|
>> |Circle|```Area```: πr2
```Circumference```: 2πr or πd|
|
>> |Trapezoid|```Area```: (a+b)h/2
```Perimeter```: a+b+c+d|
|