180 - 34 - (180 - 115). 180°, and the sum of all interior angles in a triangle is 180°.
Answer:
You need to be specific on which is the length, height and width. Making the most basic assumption I would have to assume the answer is 228
Step-by-step explanation:
Formula for the surface area of a rectangular prism is A=2(wl+hl+hw)
A = 2 x (9 x 6 + 4 x 6 + 4 x 9)
A = 2 x (54 + 24 + 36)
A = 2 (114)
A = 228
V = l x w x h. Area of the base if also lengh x width, so V = ( area of the base) x h 18 = 4.5 x h.So height : h = 18 / 4.5
The answers are X=-4 and Y=3.