**Answer**: D
Some triangles may have right angels but all triangles never have all 3 right angles
So the answer is D
Answer:
there is no option choices, but if you distribute, you get 3x^4 +12x^3 +2x^2+8x
Step-by-step explanation:
The formula for the surface area of a cylinder is pi×2rh+2pi(r^2)
In this problem, r is 4 in and h is 16 in
The statement is correct because if you were to take a protractor to each corner, it will measure exactly 90°
