GCF: greatest common factor
4 is the biggest number that goes into both 8 and 20 so that is the GCF
To construct a perpendicular bisector you set the compass to a span which is greater than half the length of the given line. Then setting the point at one end of the line construct an arc passing through the line . Then repeat this process from the other side of the line keeping the compass at the same setting.
Now draw the perpendicular bisector through the 2 intersections of the arcs. That's it.
Answer:
Step-by-step explanation:
1. 2( 2d + 2)
2.w + 12
