Question

Identify the third step in the construction of a perpendicular to a line at a point on the line using a set square.

• A. Place the set square on the line in such a way that the vertex of its right angle is at point C and one arm of the right angle falls on line AB.
• B. Draw line AB and take point C anywhere on the line.
• C. The line CD is perpendicular to the line AB at C.
• D. Draw a line CD along the other arm of the right angle of the set square.

Answer 1

The correct option is D Draw a line CD along the other arm of the right angle of the set square.

Steps for constructing a perpendicular to a line at a point on the line using a set square are as follows:

1. Draw line AB and take point C anywhere on the line.
2. Place the set square on the line in such a way that the vertex of its right angle is at point C and one arm of the right angle falls on line AB.
3. Draw a line CD along the other arm of the right angle of the set square.

The line CD is perpendicular to the line AB at C.
Hence the third step is :
Draw a line CD along the other arm of the right angle of the set square.