MaxWong

mAB

= 2/(2+3+4) * 360 deg

= 80 deg

mBC

= 3/2 * mAB 

= 120 deg

mCA

= 4/3 * mBC

= 160 deg

idek how to solve m angle A,B,C from just these informations..... sry......

??

What do you mean by this?

Window XP does not suck it can do 2^100 and show the answer properly and not using scientific notation......

Personally love Window 7 though XD

8^2 - 2^2

= 64 - 4

= 60 :D

The first sentence indicate that the width of the rectangle = 2 x 6 = 12.

2nd sentence indicates that length = 10 + 6 + 6 = 22

Area = 22 x 12 = 264

The surface area of this thing is just a 3 x 3 x 1 box surface area minus 2 faces because there are still squares in the hole.

Surface area 

= (3 x 3) x (3 x 3) x 2 + 3 x (3 x 3) x 4 - 2 x 3 x 3

= 252 square centimeters

Noice.

Melody may put this post into the Sticky topic like mine!!

My post teaches new members how to use LaTeX!!

Great job on doing this :D

~The smartest cookie in the world.

Use Pythagoras theorem to find the lengths of blue lines. 

Total length

= 4/2 + 6/2 + 8/2 + \(\sqrt{(\dfrac{4}{2})^2+(\dfrac{6}{2})^2}+\sqrt{(\dfrac{8}{2})^2+(\dfrac{4}{2})^2}+\sqrt{(\dfrac{6}{2})^2+(\dfrac{8}{2})^2}\)

= 2 + 3 + 4 + \(\sqrt{13}\) + \(2\sqrt{5}\) + 5

= 14 + sqrt(13) + 2sqrt(5)

8k/2 = 12.5% * 8 * 9

4k = 9

k = 2 1/4 :)