Question

in a tiangle angle a is 90 degree and ab is 4cm and bc is 5 cm then perimeter of triangle is
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Answer 1

Answer:  6 sq cm.

Step-by-step explanation:

ABC is a right angled triangle with angle A = 90. Hence BC = 5cm and it is the hypotenuse. The side AB = 4 cm, and so AC = [5^2–4^2]^0.5 = 3 cm.

Area of ABC = AB*AC/2 = 4*3/2 = 6 sq cm.