[171.] DE AREA RECTANGVLORVM Capvt I.

[172.] DE AREA TRIANGVLORVM Capvt II.

[173.] DE AREA QVADRILATERORVM non rectangulorum. Capvt III.

[174.] DE AREA MVLTIL ATERARVM figurarum irregularium. Capvt IV.

[175.] DE AREA MVLTILATERA-rum figurarum regularium. Capvt V.

[176.] De dimenſione circuli ex Archimede. Capvt VI.

[177.] PROPOSITIO I.

[178.] SCHOLIVM.

[179.] PROPOSITIO II.

[180.] COROLLARIVM.

[181.] PROPOSITIO III.

[182.] DE AREA CIRCVLI, INVENTIONE-que circumferentiæ ex diametro, & diametri ex circumfetentia. Capvt VII.

[183.] I.

[184.] II.

[185.] III.

[186.] IIII.

[187.] PROPOSITIO I.

[188.] PROPOSITIO II.

[189.] PROPOSITIO III.

[190.] I. EX diametro aream circuli vera maiorem inueſtigare.

[191.] II. EX diametro aream circuli vera minorem inueſtigare.

[192.] III. EX circumferentia aream circuli vera maiorem colligere.

[193.] IV. EX circumferentia aream circuli vera minorem concludere.

[194.] DE AREA SEGMENTORVM CIRCVLI. Capvt VIII.

[195.] I.

[196.] II.

[197.] III.

[198.] IV.

[199.] V.

[200.] VI.