# Glass

At the glass shop we have to cut 8 sheets of glass. Each was shaped a square with sides of 18 cm. We paid 44 CZK. How much is a 1 m2 of glass?

Result

x =  169.75 Kc

#### Solution:

$a = 18 \ cm = 18 / 100 \ m = 0.18 \ m \ \\ \ \\ S_{ 1 } = a^2 = 0.18^2 = \dfrac{ 81 }{ 2500 } = 0.0324 \ m^2 \ \\ x = 44/(8 \cdot \ S_{ 1 }) = 44/(8 \cdot \ 0.0324) = \dfrac{ 13750 }{ 81 } \doteq 169.7531 = 169.75 \ \text { Kc }$

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Most natural application of trigonometry and trigonometric functions is a calculation of the triangles. Common and less common calculations of different types of triangles offers our triangle calculator. Word trigonometry comes from Greek and literally means triangle calculation.

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