Given that OA=3cm, OB=4cm angleAOB=90°. AC=12cm&BC=13cm prove that an

1.	Given that OA=3cm, OB=4cm angleAOB=90°. AC=12cm&BC=13cm prove that angleCAB=90° .
Answer» Find AB using Pythagoras theorem, AB = 5cm, in triangle ABC, AC = 12, BC = 13, AB = 5 cm, BC is longest side, verify Sqr (AB) + Sqr (AC) = Sqr (BC), it proves triangle ABC is right angle triangle and angle opposite to BC is 90 , that is angle CAB = 90

Discussion