Constructing a triangle without a protractor Place compass point at point R, and draw an arc using compass opened to 8 cm, so as to cross the first arc.

STEP 1: Using a pencil and ruler, draw a horizontal line. Set the compass to the width of the line. Place the compass at either end of the line and draw two arcs that cross in the middle.

Draw a square. Add a diagonal line between two of its corners. The length of this line will be the radius of an arch that will determine the length of the rectangle. Place the point of the compass ...