Acute, obtuse or right triangle? !

1st, lets get those radicals into a more normal looking number:
4^2=16
16*2=32
so 4(sqrt of 2) = sqrt 32=5.66
same with the next one
4^2=16, 16*3= 48, so that = sqrt of 48 =6.93
according to Pythagorean's theorem (a^2+b^2=c^2), it can't be a right triangle, so if c^2>a^2 + b^2, then it is obtuse, and less then for acute.
Since c is the longest side, 5.66+4>6.93, so I think it's acute.

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.