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Geometry problems 8 (70..79) |
![](../images/davdata_small.gif) |
![contact](../images/post.gif) |
problems 60..69
problems 80..89
70.
Calculate radius R.
![](../geo70/fig70b1.jpg)
71.
Calculate the colored area.
![](../geo70/fig70c1.jpg)
72.
Calculate radius r.
![](../geo70/fig70d1.jpg)
73.
Calculate the colored area.
![](../geo70/fig70e1.jpg)
74.
Calculate radius R.
![](../geo70/fig70f1.jpg)
75.
Calculate radius R of the quarter circle.
![](../geo70/fig70g1.jpg)
76.
Calculate the ratio r/R.
![](../geo70/fig70h1.jpg)
77.
Calculate the colored area.
![](../geo70/fig70j1.jpg)
78.
Calculate the radius R/r.(Golden ratio).
![](../geo70/fig70k1.jpg)
79.
Calculate the colored area.
![](../geo70/fig70l1.jpg)
![](pictures/solution.jpg)
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