Answer:
c
Step-by-step explanation:
yes
Refer to c^2=a^2+b^2 (^2 means squared)
C is the hypotenuse and will be the longest measure
So 15^2= 9^2+12^2
225=225
If both sides are equal then the triangle is a right triangle, if the hypotenuse (or c) is lower or higher than you can determine whether it’s obtuse or acute
It would be a right triangle
Missing check = $412.20 - $331.60 = $80.6
Hope it helps!
Using the quadratic formula, the answers could be A B and D