Answer:
Always
Step-by-step explanation:
The definition of a perpendicular line is that it intersects another at a 90 degree angle. Using this, by verticals, the opposite corner angle must also be 90-degrees, and since one side of a line is 180 degrees, 180-90 = 90, which ensure the rest of the angles will be 90 degrees too.
First, do 16 x 3 to get 48. Then subtract 16 and youll get 32
16/20 is the correct answer
4.65
13 ÷ 20 is 0.65, just add the 4
