Answer:
75cm²
Step-by-step explanation:
<em>The area A of a triangle is given by the formula A=12bh where b is the base and h is the height of the triangle. But in this case, there are three sides. </em>
<em>To find the area of a triangle with 3 sides given as 10, 15, and 18, we assume that a = 10, b = 15, and c = 18. </em>
<em>Then the semi-perimeter is, s = (a + b + c)/2 = (10 + 15 + 18)/2 = 21.5. We will find the area of the triangle using Heron's formula.</em>
<em>A = √[s(s-a)(s-b)(s-c)]
</em>
<em>
</em>
<em>= √[8(21. 5-10)(21.5 -15)(21. 5-18)]
</em>
<em>
</em>
<em>= √[21.5 × 11.5 × 6.5 × 3.5]
</em>
<em>
</em>
<em>= √(5625)
</em>
<em>
</em>
<em>≈ 7.5</em>
