∆ABC is right angled at B . If AB = 7cm and BC = 24 , find its semi perimeter .
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Answer:
28cm (56/2 cm)
Step-by-step explanation:
The hypotenuse of a right angled triangle can be found if the lengths of base and height are given. Here, Δ ABC is right angled at B.
Therefore, AB=7cm [given], BC=24cm [given] and with this information in hand, AC would be 25cm [Pythagoreas theorem].
Semi-perimeter = (A+B+C) /2
= (7+24+25)/2 => (7+49)/2
= 56/2 = 28cm
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