The answer is D. This is because a triangle must be 180 degrees, and both A and B are equal to 180. For the sides, you simply follow a squared plus b squared equals c squared. D doesnt fit that equation, so the answer is D.
In a rectangular prism, surface area is calculated by multiply all the faces of the prism that you can touch
Becuase there's four faces that have the measurement of 5*3, you do 4(5*3) and because there's only two faces that have the measurement of 3*3, you do 2(3*3)
Which becomes 4(5*3)+2(3*3) which is 78
The slope of a line that is perpendicular to y = x - 6 means that the slope has to be a negative reciprocal of the original slope
That means the slope of the line that is perpendicular to y = x - 6 is '-1'
Hope that helps!
