<s xml:id="echoid-s3563" xml:space="preserve">Cum ergo diameter quadrati ſecet an-
gulos eius rectos bifariam, in ſemirectos nimirum, tranſibit filum per angulum
<lb/>
C: </s>
<s xml:id="echoid-s3564" xml:space="preserve">Ac proinde tam CAB, quam CAD, æqualis tunc erit angulo altitudinis E-
<lb/>
AG. </s>
<s xml:id="echoid-s3565" xml:space="preserve">Quando autem pinnacidiorum latus cum radio HA, coincidit, erit angu-