Apex

You are the tip…

Angle

You are a…..

Algorithm

You are a systematic….

Algebra

I am the branch of mathematics…..

Adjacent sides

Two sides of a polygon….

Adjacent angles

You are neighbouring…..

Adjacent angles

<![CDATA[You are neighbouring You are touching You have the same vertex A line in common it reflects When two of you lie on a straight line, Your sum is 180o defined]]>

Acute Angle

Looking at your rule…….

Acre

You are the acre……

Acceleration

It is the rate…….