Mathematics

Problem

The perimeter of a triangle is

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

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

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

42\,\text{cm}^2