Maths revision topics...

• Angles in a triangle add up to 180. 

• Angles on a streight line also add to 180. 

 c + d = 180 

a = 40° (corresponding angle to angle at point D)
 c = 40° (AB = CB, therefore angle a = angle c)
 b = 100° (angles in a triangle add up to 180°)
 e = 140° (e and c are co-interior angles)

Cube = a ³                                                                                                                                             

• a is the side length

Rectangular prism = length x width x height

Cylinder = π x r ^{2 x}  h

• Direct = 

y = kx 

• Inverse = 

y ∝ 1

      --

       x                =                y = k

                                                 --

                                                  x  

• proportion: 
• https://corbettmaths.com/2013/04/04/direct-proportion/

• volume: 
• https://corbettmaths.com/?s=volume

• Angle properties: 
• https://corbettmaths.com/?s=angles