# Geometry Help

Hello everyone,

I need help with a couple of problems, right now I'm focusing on number 25.

http://img24.exs.cx/img24/2291/probs.gif

Also, if any of you have time, could you please tell me if I have missed any so far. Thanks.

22. A= 3768.2 units^2
23. A= 25.3 units^2
24. A= 5.4 units^2

And now if I could just get some help with the others...

Related Introductory Physics Homework Help News on Phys.org
arildno
Homework Helper
Gold Member
Dearly Missed
Now, you've got a square with the diagonal given, right?

arildno said:
Now, you've got a square with the diagonal given, right?
I need help going about finding the lenght of the sides

arildno
Homework Helper
Gold Member
Dearly Missed
Sure enough, but:
1) You've got a square, right?
So, how does then the vertical side compare in length to the horizontal side?
2) Try to set up Pythagoras' theorem with the diagonal as the hypotenuse..

The lenght of all the sides would be 7.5 sqrt(2) right?

We have C from Pythagoras' therom
$$a^2 + b^2 = c^2$$

however for a square
$$a=b$$

so
$$a^2 + a^2 = c^2$$
$$2a^2=c^2$$

$$2a^2=15^2$$
$$2a^2=225$$

since area of a square is just a*b and a=b
area equals a*a or a^2 so divide the two out
$$a^2=\frac{225}{2}$$

I believe 22 is wrong
23 is right rounded
24 is right rounded

Last edited:
22. by law of sines

$$\frac {73}{\sin{\theta}}=\frac{x}{\sin{\theta}}$$

therefore must also be 73
73*73*.5 = 2664.5