Formulas

其實 F.1 - F.3 真係有好多既 Formulas 同埋 Theorm 要交嫁 !
F.1 --> 係角度就已經有好多野要學了..
angles sum of triangle
設三隻角為 a, b, c
a + b + c = 180。
vertically opposite angles
Vertically opposite angles are angles that are opposite to each other and are also equal.

圖片參考：http://www.mathsteacher.com.au/year7/ch08_angles/04_vert/Image10523.gif

F.1 仲有好多..
你其實可以參考一下呢個網址. 睇下幫唔幫到你 ?
http://www.eformulae.com/mathematics/index.php
希望可以幫到你 =]

沒教formula,不過有很多Theom