Answer:
He is dividing the angle BAC into two equal parts.
Step-by-step explanation:
Initially, he places the compass at point A and draws two small arcs intersecting points D and E. Next, setting the compass at D and then at E, he draws two arcs that intersect between the line segments AB and AC.
The bisecting line is drawn from point A through the intersection of these arcs.
The reasoning follows that both angles are 90 degrees.
20 102.3 rounded down is 100 4.7 rounded up is 5. 100 divided by 5 equals 20, as 5 times 20 equals 100.
