Which construction is illustrated above?

The correct option is 1.

Step-by-step explanation:

From the given figure it is easily noticed that the construction is

used to draw a perpendicular line to a given line from a point on the line.

In the given figure we have lines and a red point lies on the line.

First of all the two equidistance arc are drawn on the given line.

Then increase the measurement of the compass and put the compass on first arc and make another arc on the left side, then put compass on second arc. Now draw an arc which intersects the third arc.

Then by joining the given point and the intersection point, we get a line perpendicular to the given line from the point on the line.

Therefore option 1 is correct.

what is the approximate angle of acb if abc is 25cm and the length of segment bc is 15

step-by-step explanation: