| (a+b+b+c)*12 | ||
Ptrapezu = | ||
| 2 |
| 12 | 3 | 4 | ||||
sinα= | = | to cosα= | ||||
| 20 | 5 | 5 |
| 12 | 4 | 3 | ||||
sinβ= | = | to cosβ= | ||||
| 15 | 5 | 5 |
| 3 | 3 | 4 | 4 | |||||
sinγ= sin(α+β)= | * | + | * | = 1 ⇒ γ=90o | ||||
| 5 | 5 | 5 | 5 |
| 1 | ||
P= | *20*15=150 | |
| 2 |
| 5^2 | 52 |
| 2^{10} | 210 |
| a_2 | a2 |
| a_{25} | a25 |
| p{2} | √2 |
| p{81} | √81 |
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