### Blogging for the Test!

Hello!

We had just finished our fifth unit, which was Geometry! When we started the unit, we learned the volume and surface area of a sphere, which are:

**V: 4/3 (pi)radius**

**^3**and the surface area is

**: S.A: 4(pi)radius^2**

and then we learned if the volume or the surface area increased how do we apply these rules. For example if I triple the radius of a sphere, what will happen to S.A or V?

*and the answer is the volume will increase by 3 square which is 27 and the surface area will increase by 9.*

We learned about scale factor and how it works.

" The impact of 'scale factor' on lengths, areas and volumes." A scale factor is a multiplier.

Areas are multiplied by the square of the scale factor. (we multiply the area by the scale factor square)

Volumes are multiplied by the cube of the scale factor. ( multiply the volume by the scale factor cube)

after this we learned a lot about Quadrilaterials.

**quadrilaterial**: any 4 sides figure. they come in two basic flavours ;)

Convex Quadrilaterial and Concave or Dart. (i was going to draw it but i couldn't)

And the types of quadrilaterial:

**Trapezoids: Trapezoid, Right Trapezoid, Isosceles Trapezoid**

**/**

**Parallelograms:**

**Rectangle, Rhombus, Square**

and at last we learned the special qualities and more stuff about them.

and this was our unit!

I hope everyone will get a good mark!

P. A

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