Question

help please! how do i do this?!

Answer 1

For the first one, make a line that is the sum of both a and b "glued together"
bisect that line, to find the center.
make a circle using the center of the line as the center of the circle
with radius of 1/2 of the line
draw a perpendicular from the point where a/b meet
until it reaches the circle.