Constructing a Triangle With Given Sides

Suppose we want to construct a triangle with sides 5 cm, 6 cm and 7 cm. We use compass and ruler. Start with the base, and mark a line of 5 cm, PQ below.



Open the compass to a length of 6 cm and draw an arc as shown below.

Now open the compass to a length of 7 cm and from the other end of the base, draw an arc as shown below.

The arcs so drawn cross at the third vertex, R, of the triangle.

Add comment

Security code
Refresh