Calculate 2575

Calculate the area and height of the rhombic cover plate to which the following applies:

d (BC) = 60 cm, angle BAD = 45 °, angle ADB = 90 °.

Correct answer:

S =  1800 cm²

Step-by-step explanation:

$$\begin{gathered} BC=60\text{cm} \\ \alpha =45°\to \text{rad}=45°\cdot \frac{\pi }{180}=45°\cdot \frac{3.1415926}{180}=0.7854=\pi /4 \\ S=B{C}^2\cdot \cos \alpha \cdot \sin \alpha =60^2\cdot \cos 0.7854\cdot \sin 0.7854=1800{\text{cm}}^2 \end{gathered}$$

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