Question

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Answer 1

Answer:

Step-by-step explanation:

Using Heron's formula to calculate the area-:

$\sqrt{(s)(s-a)(s-b)(s-c)}$

$s = (a+b+c)/2$

In this question -:

S = (13+12+5)/2

   =15

Area = √(15)(15-13)(15-12)(15-5)  

        = √(15)(2)(3)(10)

        = 3×2×5 = 30cm²

Area = 1/2×base×height

30 = 1/2×13×height

60/13 = Altitude  [Base is 13 cm]

Answer 2

Answer:

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