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re: Any of you follow World of Engineering on Twitter?

Posted on 7/18/22 at 7:46 pm to
Posted by TigerstuckinMS
Member since Nov 2005
33687 posts
Posted on 7/18/22 at 7:46 pm to
A is 30. B is B.

EDIT: Totally not 30. It's 45. I wronged when I should've righted.
This post was edited on 7/18/22 at 7:56 pm
Posted by poochie
Houma, la
Member since Apr 2007
6393 posts
Posted on 7/18/22 at 8:00 pm to
i get 45 (44.99...) for a. visually that looks close as if you lay the tilted square flat it would be between 6 and 7 units all (3+2+1+a little due to the tilt)^2

Posted by East Coast Band
Member since Nov 2010
62960 posts
Posted on 7/18/22 at 8:02 pm to
45 is right for A. I can't do simple math.
Use the Pythagorean theorem for the side.
By looking at the 4 box and 9 box, you'll realize the triangle formed is a 1 : 2 ratio of length v. Height.
The overall height of the 3 boxes is 6 ( 3+2+1=6)
Thus the length across the bottom would be 3.

6^2 + 3^2 = 45
The length of one side of the unknown square would be square root of 45.
So, just square that and get 45 for area of the big box
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