Construction of Triangles
 A triangle can be constructed if all its sides are known.
Example:
Construct a triangle whose sides are 3 cm, 5cm and 7 cm.
Solution:

 Draw a line segment AB of length 7 cm. With A as centre and radius equal to 3 cm, draw an arc.

 With B as centre and radius 5 cm, draw another arc cutting the earlier drawn arc at C.

 Join AC and BC to get ΔABC.
 A triangle can be constructed if the length of two sides and angle between them are given.
Example:
Construct ΔABC where BC = 7 cm, AB = 5 cm and ∠ABC = 30°
Solution:

 Draw a line segment…
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