Question

In triangle ABC, ab =20cm, bc=21cm and the perimeter of triangle ABC =70cm find the area using herons formula ​

Answer 1

Here is your answer ✌️✌️⚠️⚠️✨

Perimeter = 70 cm

s = p/2

s = 70/2 = 35 cm

s = a + b + c / 2

35 = 20 + 21 + c /2

35 = 41 + c /2

or 70 = 41 + c

c = 70 - 41

c = 29

ab = 20cm, bc = 21cm, ac = 29cm

Now you can apply heron's formula and you get the area of triangle ABC = 120cm^2

Hope this helps you ✨⚠️✌️

Answer 2

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