The ramp will form a triangle with height 2ft and base 6ft.
The length of the ramp will be the hypotenuse of this triangle. length² = height² + base² length = √(height² + base²) length = √(2² + 6²) length = √(4 + 36) length = √40 length = 6.3ft
"color the piece according to your color chart." Do you have that? If you don't, I wouldn't worry, you still did all the work and got all the answers, so your teacher should be fine with it.