De Schrijver.
VAASSEN den 14 April 1834.DM : DF | = | AC : AD. | |
of | r : x-z | = | 2r : AD. |
Zoo is | AD | = | 2x - 2z |
en | AM | = | 2x - 2z + r. |
/ AFO | = | / FOF' | = | a. | ||
/ AF'O | = | / AFO | + | / FOF' | = | 2a. |
/ FAO | = | / AF'O | = | 2a. | ||
/ FAO | + | / AFO | = | / FOB. | ||
of 2a | + | a | = | / FOB. | ||
3a | = | / FOB. | ||||
a | = | 1/3 / FOB. |
OF' | = | fF' | = | r | |||
dus is | /fOF' | = | /OfF'. | ||||
en | /fOF' | + | ½b | = | | | ||
Maar | ½b | = | a | = | /FOF'. |
/ AQO | = | 1/3/ QOB. | § VI. |
/ AQO | = | 1/3/ (3a + | ). | |
/ AQO | = | a + 1/3| . |
/ APO | = | 1/3/ POB. | § VI. |
= | 1/3 (| - / FOB). | ||
= | 1/3 (| - 3a). | ||
a' | = | 1/3 | - a. |
/ BAQ | = | 2| - /AQO - / AOQ. |
= | 2| - a -1/3| - 3a'. | |
/ BAR | = | 2| - / ARO - / AOP. |
= | 2| - a' - 1/3| -3a. |
/ BAQ | = | 2| - 1/3| - a - 3a' |
en / BAF | = | 2a |
Zoo is / FAQ | = | 2| - 1/3| - 3(a+a') = 2/3| . |
gP'Ah | = | 3 | . | |
Cg | = | 3a. | |
[pag. 15] | CP'Ah | = | 3 | - 3a. |
en | / fOF' | = | | - a. |
Zoo is | /fOF' | = | 1/3 CP'Ah. |
Insgelijks is | /pOP' | = | 1/3 CF'Ak. |
Men vindt voorts | /AfO | = | 1/3 CF'Ai. |
en | / ApO | = | 1/3 CP'Ag. |