Answer:
4
Step-by-step explanation:
- To be perpendicular, the product of the slope is -1.
- (x,y) Substituting the coordinates.
- y= 1/3(x+3) + 1
- y= 1/3x +2
I think you can do that on photo math
The answer is 30, assuming it is a cube,
The answer would be theorem Side angle side (aka SAS)