Question

12,14 and 16 are the length of the sides on the triangle

Answer 1

Answer: 81.33 square units

Step-by-step explanation:

Given sides of triangle = 12,14 and 16 are the a,b and c respectively.

Thus the perimeter of triangle $=a+b+c=12+14+16=42$

The semi perimeter of triangle $s=\frac{42}{2}=21$

By Heron's formula

Area of triangle = $\sqrt{s(s-a)(s-b)(s-c)}$

$=\sqrt{21(21-12)(21-14)(21-16)}\\\\=\sqrt{21(9)(7)(5)}\\\\=\sqrt{6615}\\=81.3326\approx81.33\text{ square units}$

The area of triangle =81.33 square units.

Answer 2

The answer is B)81.33 square units