​construct a triangle ABC right angle at B, BC=4cm and  hypotenuse AC=6cm

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using phythygorous therom find AB. 
1. Draw BC of 4 cm. 
2. Contruct 90* using scale and compass.
3. then add side AB and AC. 
4. then using the compass mark the sum on the ray A'B.
5. then bisect the A'C
​6. The point at which the bisector intersect A'B mark the point as A.
7. join A and C.
8. Hence your right angle triangle ABC is ready
(IMP :- note that i have use A' means A dash )
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