The first side of a triangle has length 3y + 5. The second side's length is y - 4. The third side's length is 6y. Write the perimeter in simplified form.

Urgent? will give brainliest given that the blue triangle is a right triangle, which expression correctly gives the area of the red square? a) a2 + b2 b) a2 - b2 c) a2 - c2 d) c2 - a2