A triangle interior angles add up to 180
so we have 3:4:5
the ratio of the angles
3+4+5=12
therefor 180=12 units
divide by 12
15=1 unit
subsitute
find the smallest unit
3
3 times 15=45
answer is 45 degrees
One is 2,000 less than 6,000,000
Its a plastic film you use if you want to get pictures out immediately from the camera.
There are 3 significant figures because there are 3 digits which aren't 0's