UPSKILL MATH PLUS

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Draw a line perpendicular to the given line at a point on a line.
Step $$1$$: Draw a line $$PQ$$.

Step $$2$$: Take a point $$R$$ anywhere on the line $$PQ$$.

Step $$3$$: Place the set square on the line in such a way that the vertex which forms right angle coincides with $$R$$ and one arm of the right angle coincides with the line $$PR$$.

Step $$4$$: Draw a line $$RS$$ through $$R$$ along the other arm of the right angle of the set square.

Step $$5$$: The line $$RS$$ is perpendicular to the line $$PQ$$ at $$R$$. That is, $$RS \perp PQ$$ and $$\angle SRP = \angle SRQ = 90°$$.

Draw a line perpendicular to the given line through a point above it.
Step $$1$$: Draw a line $$AB$$.

Step $$2$$: Take a point $$P$$ anywhere above the line $$AB$$.

Step $$3$$: Place one of the arms of the right angle of a set square along the line $$AB$$ and the other arm of its right angle touches the point $$P$$.

Step $$4$$: Draw a line $$PR$$ through $$P$$ along the other arm of the right angle of the set square.

Step $$5$$: The line $$PR$$ is perpendicular to the line $$AB$$ at $$R$$. That is, $$PR \perp AB$$ and $$\angle PRA = \angle PRB = 90°$$.