Question

Non right angled triangle

Answer 1

18.06

Explanation:

law of cos()

b^2 = (16.5)^2 + (17.1)^2 - 2(16.5)(17.1)cos(65)

`\frac{3√(2)\sqrt{-3135\cos \left(65^(\circ \:)\right)+3137}}{10}\quad \begin{pmatrix}\mathrm{Decimal:}&18.06035\dots \end{pmatrix}`