(i) Equilateral triangle
(ii) Isosceles triangle
(iii) Scalene triangle
(iv) Acute-angled triangle
(v) Obtuse-angled triangle
(vi) Right-angled triangle
Calculate the value of \(x\) in the following diagram.
Noted that the sum of all the interior angles is \(180^\circ\).
Thus,
\(\begin{aligned} 37^\circ+92^\circ+x&=180^\circ \\\\129^\circ+x&=180^\circ \\\\x&=180^\circ-129^\circ \\\\&=51^\circ. \end{aligned}\)
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