Volume 2

The elements of Euclid explain'd. In a new, but most easie method, together with the use of every proposition through all parts of the mathematicks / Written in French, by that exccellent [sic] mathematician F. Claud. Francis Milliet de Chales ... And now carefully done into English. And purg'd from a multitude of errors, which had escap'd in the original.

Euclid

Date:: 1685

Credit: The elements of Euclid explain'd. In a new, but most easie method, together with the use of every proposition through all parts of the mathematicks / Written in French, by that exccellent [sic] mathematician F. Claud. Francis Milliet de Chales ... And now carefully done into English. And purg'd from a multitude of errors, which had escap'd in the original. Source: Wellcome Collection.

32/392 page 22

$© “as 1 fhali demonftrate hereafter. Therefo »1|\ | ‘the angle of Incidence. AFC; is equal ‘to thit) | » Canole of Reflexion BFD ; and by confequeliad) |) the Reflexion will beby AFB, μμ... Τ η Ε OR EM. Ia Ifofceles,' or € πα. ο. triangles, the angl thofe that are below tt. A D Let the Ifofceles {hi tz, | 51 oa tT AB@,-thac is co (ΑΜ. Jerrhe fides AB, Al { \s ibedqdual. I fay che ait A ‘gles ABC, ACB are: (M: Vaud! ; as alfo che aq: 01 Je 1 K oles GBC, HCB, ΙΤ. ate bélow che bafe BC.’ Suppofe another: τι angle DEF, having the arele D equal το. AC. Sincé the fides AB, ACareequal, all ti four tbe AB, AC; DEY DE will be equal: |) Demohffration. Sincé'the fides AB, DE; At! DF, are eqiial ; as alfo the angles A, and σ] if che criangté DEF bé! plac’d upon ABC, cha | W1ill 4$

Licence and re-use

Contents

Volumes