The perimeter of a triangle is

MATHEMATICS · Single correct · CBSE · Mathematics · Heron's Formula · Heron's Formula

Problem

30\,\text{cm}

. Two of its sides measure

10\,\text{cm}

and

9\,\text{cm}

. What is the area of the triangle? (a)

45\,\text{cm}^2

(b)

30\sqrt{3}\,\text{cm}^2

(c)

30\sqrt{2}\,\text{cm}^2

(d)

42\,\text{cm}^2