WHAT YOU NEED: a ruler, a compass and a pencil. STEP 2: Put the pin of a compass at the end of the line you want to bisect. Set the compass to more than half the length of the line, and draw an arc ...

Place your compass on the vertex of the angle, here on point B. Draw an arc that crosses both sides of the angle, lines AB and BC. Finally, draw a line from the vertex of the angle through the cross ...