Space diagonal angles

Calculate the angle between the body diagonal and the side edge c of the block with dimensions: a = 28cm, b = 45cm and c = 73cm. Then, find the angle between the body diagonal and the plane of the base ABCD.

Correct answer:

C =  35.9807 °
A =  54.0193 °

Step-by-step explanation:

$$\begin{gathered} A+C=90\mathrm{°} \\ A=90-C=90-35.9807=54.0193\text{°}=54\mathrm{°}{1}^{\mathrm{\prime }}10\mathrm{"} \end{gathered}$$

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