The right angled triangle ABC has a hypotenuse AC = 7 cm and side BC = 3 cm. Calculate the length AB and hence the angle ACB. Share with your friends Share 0 Neha Sethi answered this Dear student In right angled △ ABC, by pythagoras theorem H2=P2+B2 where H=hypotenuse,B=base,P=PerpendicularSo, AC2=AB2+BC2Given AC=7cm, BC=3 cm72=AB2+3249-9=AB2AB2=40So, AB=210 cmTo find: ∠ACB we need the concepts of trigo which will be taught in class10 but still providing the solution.sinθ=PH=ABAC=2107So, θ=sin-12107 Regards 1 View Full Answer Piyush answered this in right triangle ABC (AC)2=(AB)2+(BC)2 72=(AB)2+32 49-9=(AB)2 40=AB2 AB=2root10 1
