Glazing workshop

Roof arches have the shape of an equilateral triangle. The length of the side of the arch was 0.6 m and the height 0.52 m. How many m² of glass are needed for glazing 48?

Correct answer:

S =  7.488 m²

Step-by-step explanation:

$$\begin{gathered} n=48 \\ a=0.6\text{m} \\ h=0.52\text{m} \\ {S}_1=a\cdot h/2=0.6\cdot 0.52/2=\frac{39}{250}=0.156{\text{m}}^2 \\ S=n\cdot S_1=48\cdot 0.156=7.488{\text{m}}^2 \end{gathered}$$

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