Lines and planes: distances and angles

2010015804

Level: 
B
The base \( ABCD \) of a square pyramid \( ABCDV \) has an edge of \( 6\,\mathrm{cm} \). The height of the pyramid is \( 3\sqrt2\,\mathrm{cm} \). Find the distance between the point \( A \) and the line \( CV \) (see the picture).
\( 6\,\mathrm{cm} \)
\( 3\sqrt{3}\,\mathrm{cm} \)
\( 9\,\mathrm{cm} \)
\( 3\sqrt{2}\,\mathrm{cm} \)

2010015808

Level: 
B
The picture shows a square pyramid. The side of a base square is \(a = 6\; \mathrm{cm}\) and the height of the pyramid is \(v = 10\; \mathrm{cm}\). Find the angle \(\varphi \).
\(\mathop{\mathrm{tg}}\nolimits \varphi = \frac{10} {3\sqrt2}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 67^{\circ }\)
\(\mathop{\mathrm{tg}}\nolimits \varphi = \frac{10} {3}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 73^{\circ }18^{\prime}\)
\(\mathop{\mathrm{tg}}\nolimits \frac{\varphi}{2} = \frac{3\sqrt2} {10}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 45^{\circ }59^{\prime}\)
\(\mathop{\mathrm{tg}}\nolimits \frac{\varphi}2 = \frac{3} {10}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 33^{\circ }24^{\prime}\)

2010015809

Level: 
B
The picture shows a square pyramid \(ABCDV\). The side of a base square is \(a = 6\; \mathrm{cm}\) and the height of the pyramid is \(v = 8\; \mathrm{cm}\). Find the angle \(\varphi \) between the opposite lateral edges (the angle \(AVC\)).
\(\mathop{\mathrm{tg}}\nolimits \frac{\varphi}2 = \frac{3\sqrt2} {8}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 55^{\circ }53'\)
\(\mathop{\mathrm{tg}}\nolimits \varphi = \frac{3\sqrt2} {8}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 27^{\circ }56^{\prime}\)
\(\mathop{\mathrm{tg}}\nolimits \frac{\varphi}{2} = \frac{3} {8}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 41^{\circ }7^{\prime}\)
\(\mathop{\mathrm{tg}}\nolimits \frac{\varphi}2 = \frac{8} {3\sqrt2}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 124^{\circ }7^{\prime}\)

2010015810

Level: 
B
The picture shows a square pyramid. The side of a base square is \(a = 10\; \mathrm{cm}\) and the height of the pyramid is \(v = 10\; \mathrm{cm}\). Find the angle \(\varphi \) between the lateral edge and the edge of the base of the pyramid.
\(\mathop{\mathrm{tg}}\nolimits {\varphi} = \sqrt5 \mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 65^{\circ }54^{\prime}\)
\(\mathop{\mathrm{tg}}\nolimits \varphi = \frac{\sqrt5} {5}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 24^{\circ }6^{\prime}\)
\(\mathop{\mathrm{tg}}\nolimits \frac{\varphi}{2} = \frac{\sqrt5} {5}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 48^{\circ }11^{\prime}\)
\(\mathop{\mathrm{tg}}\nolimits {\varphi} = \frac{\sqrt{10}} {2}\mathrel{\implies }\varphi \mathop{\mathop{\doteq }}\nolimits 57^{\circ }41^{\prime}\)

9000046408

Level: 
B
Consider a cone of base radius \(r\) and a special shape: the shape is such that the volume of the cone is related to the base radius by the formula \(V =\pi r^{3}\). Find the angle between the side of the cone and the base. Round your answer to two decimal places.
\(71.57^{\circ }\)
\(45^{\circ }\)
\(63.43^{\circ }\)

9000046409

Level: 
B
The base of a pyramid is a square with the side of \(2\, \mathrm{cm}\). The height of the pyramid is \(4\, \mathrm{cm}\). Find the angle between the lateral side of the pyramid and the base. Round your result to two decimal places.
\(75.96^{\circ }\)
\(70.52^{\circ }\)
\(79.98^{\circ }\)

9000128801

Level: 
B
The base \(ABCD\) of a square pyramid \(ABCDV \) has side \(6\, \mathrm{cm}\). The height of the pyramid is \(4\, \mathrm{cm}\). The point \(M\) is the middle of the side \(CV \). Find the distance between the point \(M\) and the plane \(ABC\).
\(2\, \mathrm{cm}\)
\(\frac{\sqrt{34}} {2} \, \mathrm{cm}\)
\(\frac{5} {2}\, \mathrm{cm}\)

9000128802

Level: 
B
The base \(ABCD\) of a square pyramid \(ABCDV \) has side \(6\, \mathrm{cm}\). The height of the pyramid is \(4\, \mathrm{cm}\). The point \(M\) is the middle of the side \(CV \). Find the distance between the point \(M\) and the line \(BC\).
\(\frac{5} {2}\, \mathrm{cm}\)
\(\frac{\sqrt{34}} {2} \, \mathrm{cm}\)
\(\frac{\sqrt{7}} {2} \, \mathrm{cm}\)

9000128803

Level: 
B
The base \(ABCD\) of a square pyramid \(ABCDV \) has side \(6\, \mathrm{cm}\). The height of the pyramid is \(4\, \mathrm{cm}\). The point \(M\) is the middle of the side \(CV \). Find the distance between the point \(M\) and the line \(AD\).
\(\frac{\sqrt{97}} {2} \, \mathrm{cm}\)
\(\frac{\sqrt{106}} {2} \, \mathrm{cm}\)
\(\frac{\sqrt{65}} {2} \, \mathrm{cm}\)

9000128804

Level: 
B
The base \(ABCD\) of a square pyramid \(ABCDV \) has side \(6\, \mathrm{cm}\). The height of the pyramid is \(4\, \mathrm{cm}\). Find the distance between the line \(AD\) and the plane \(BCV \).
\(\frac{24} {5} \, \mathrm{cm}\)
\(\frac{15\sqrt{34}} {5} \, \mathrm{cm}\)
\(6\, \mathrm{cm}\)