Answer:
All of them are parallel
Step-by-step explanation:
This is due to the all of the 90 degree angle which would make the rest of the line a would be another 90 degree angle Which are found on every line. This would make all of the lines parallel because it is a total of 180 degrees.
You could use change of base formula
Answer:
square
rectangle
quadrilateral
Step-by-step explanation:
Sides are all equal
You can make a proportion of 8/20 to 42/x and then simply cross multiply from there to solve for y
That would be 8, its in the center so forget 9 or 7.