Draw a Ray BX and with B as center and radius 4.8cm cut an arc on the line and name it as C.
With B as center and 3.6cm as radius draw an arc.
With C as center and 3cm as radius cut the previous arc at A.
Join AB and AC.
Our Triangle is constructed.
Now we know that the angle opposite to the smallest side is the smallest angle in a triangle.
So ∠ABC is the smallest.
Now bisecting the ∠ABC
With B as center draw an arc that cuts AB and BC at P and Q respectively.
With P as center and radius more than PQ draw an arc then with Q as center and equal radius draw another arc that cuts the previous arc at Z.
Now by cosine rule we get to know that ∠ABC=40°
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