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.[5]
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Solution
Step 1: Using a scale draw a line XY = 7.8cm, and mark a point A on the line.[0.5]
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.[2] 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.
[2] Step 5: The line BO is parallel to XY. That is, BO ║XY. [0.5]