Question

Exercise 4.2
Draw a line segment AB = 7 cm and mark a point P on it. Draw a line perpendicular to
the given line segment at P.​

Answer 1

Steps to draw a perpendicular from a given point

1. Draw a line segment of length 7cm
2. Take any random point P on the line segment
3. Take a compass and just take a radius of any unknown length
4. Then put the pointer of the compass on P
5. Make a semi-circle with it on P
6. Now replace the point of the compass to and one side of the semi-circle which touches the line segment AB
7. Make 2 arcs on each side of the line segment as shown in the attachment
8. Now replace the pointer of the compass to the other side of the semi-circle and repeat the same step given above
9. Now with the help of a scale align all the 3 points in a single straight line and draw a line on it

This line makes an angle of 90° with the point P