Question

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Answer 1

Step-by-step explanation:

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Answer 2

Answer:

b) 84 cm²

Step-by-step explanation:

let, a= 7 cm , b = 24 cm , c= 25 cm

half of perimeter, s = (7+24+25)/2  cm= 28 cm

area = $\sqrt{s(s-a)(s-b)(s-c)} = \sqrt{28(28-7)(28-24)(28-25)} = \sqrt{28\times21\times4\times3} \\ =\sqrt{7056} = 84$