I need help on number 3 please!!

Yes the two triangles are similar

Step-by-step explanation:

For two triangles to be similar, all three of the angles must be the same, side lengths are irrelevant. So triangle 1 has a 50 and 25 degree angle so to find the third you subtract them from 180. This leaves you with 105. So triangle 1 is a 50-25-105 triangle. Now make sure that triangle 2 is also a 50-25-105 triangle. Triangle two has a 50 and 105  degree angle. Subtract those from 180 and you get 25. So both triangles have the same angle measurements making them similar.

An estimation is made by slightly rounding the numbers, then multiplying , adding, subtracting, or dividing.
In this case , to make an estimate, I would round 114 to 100, and 92 to 90... 100 x 90 = 9,000 sq in
You can of course round closer than that, depending on how accurate you want it to be, but the exact answer is 10,488, Wich you can round to 10,000 or 10,500
Hope this helped :)