hugomimihu

There are 4 choices for the first digit: cant be 0.

There are also 4 for the second, 3 for the third, 2 for the fourth, 1 for the fifth.

Thus, 4*4*3*2 = 96 ways.

Double.

That means that instead of the (2.5)^2 π area, we have...

Twice!

So, 2.5^2 = 6.25 

minus (0.5)^2 π = 0.25π for the area of the middle

6π

12π+0.25π = 12.25π

sqrt(12.25) = 3.5

7 units diameter

Oops I made a mistake earlier, Corrected now

no problem!

Read guest's answer below

I'll give you a point later and subtract for mine, but the site won't let me do it now

Let's draw a line that is parallel to the top and bottom passing through X.

The angle next to 25degrees is 180-25 = 155, and the one by 30 is 180-30 = 150.

Hey we don't need to know that!

The "chopped off" angle part on the bottom of the middle line, is also 25, and the top part is 30

Thus X = 30+25 = 55 degrees.

huh.

Light year refers to how much years traveling at light speed it would take you to reach point B from point A, so light century is probably the number of centuries travelling at light speed.

great, contact me if you need any more hlep :)

oof I need "hlep" on my spelling

Ah, apologies.

You draw a diagonal, or line segment, from point E to G. This should meet the OTHER one from F to H at a point X.

Why are you reposting so fast, and after I already answered your question?

I provided the answer and the ONLY thing you need to do is simplify!

According to your previous questions you "reposted by accident"

You also managed to post TWICE as guest, once in account.