9000153704

Level: 
Project ID: 
9000153704
Source Problem: 
Accepted: 
1
Clonable: 
1
Easy: 
0
The picture shows a square pyramid. The side of a base square is \(a = 4\; \mathrm{cm}\) and the height of the pyramid is \(v = 6\; \mathrm{cm}\). Find the angle \(\varphi \).
\(\mathop{\mathrm{tg}}\nolimits \frac{\varphi } {2} = \frac{2} {2\sqrt{10}}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 35^{\circ }6^{\prime}\)
\(\mathop{\mathrm{tg}}\nolimits \varphi = \frac{6} {2\sqrt{2}}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 64^{\circ }46^{\prime}\)
\(\mathop{\mathrm{tg}}\nolimits \frac{\varphi } {2} = \frac{2} {6}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 36^{\circ }52^{\prime}\)
\(\mathop{\mathrm{tg}}\nolimits \frac{\varphi } {2} = \frac{2\sqrt{2}} {6} \mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 50^{\circ }29^{\prime}\)