Step-by-step explanation:
Given,
Height of the triangle
[tex] = 5 \frac{1}{2} mm[/tex]
Base of the triangle = 12mm
Therefore, area of the triangle
[tex] = \frac{1}{2} \times base \times height[/tex]
[tex] = (\frac{1}{2} \times 5\frac{1}{2} \times 12) {mm}^{2} [/tex]
[tex] = (\frac{1}{2} \times \frac{11}{2} \times 12) {mm}^{2} [/tex]
[tex] = 33 {mm}^{2} (ans)[/tex]
