UPSKILL MATH PLUS

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Learn moreDraw 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 \(\angle PRA = \angle PRB = 90°\).