Question

Draw a line segment measuring 7.8 cm. Mark a point B above it at a distance of 5 cm. Through B draw a line parallel to the given line segment.$\left[5\right]$

Answer 1

Step 1: Using a scale draw a line XY = 7.8cm, and mark a point A on the line.$\left[0.5\right]$

Step 2: Place the set square in such a way that the vertex of the right angle coincides with A and one of the edges of right angle lies along XY. Mark the point B such that AB = 5 cm.$\left[2\right]$
Step 3: Place the scale and the set square as shown in the figure.
Step 4: Hold the scale firmly and slide the set square along the edge of the scale until the other edge touches the point B. Draw a line BO through B.

$\left[2\right]$
Step 5: The line BO is parallel to XY. That is, BO ║XY.
$\left[0.5\right]$