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Geometry problems (40..49) |
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problems 30..39 |
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problems 50..59 |
40.
Calculate the area of the square.


41.
See quadrilateral ABCD with given angles.
BC=DC.
Calculate angle x.


42.
Next picture consists of circle arcs.
Prove that the red and blue shaded areas are equal.


43.
Prove that in next picture: 


44.
Find formula for the blue area.


45.
Calculate the area of quadrilateral ABCD.


46.
ABCD is a square.
Calculate length x of an edge.


47.

prove that |  |

48.

prove that |  |

49.

calculate ratio |  |

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