the rest of the circumference.Then the ZAOB (if the centre is double the ZACB ((tthe circumferen ee. Join CO, and produce it to E. Then •.• OA = OC, the ZOAC= ZOCA. But ZAOE= ZOAC+ ZOCA; .. ZAOE = twice ZOCA. Similarh ZBOE = twice ZOCB. Hence, adding in Figs. 1 and 3, and subtracting in Fig. 2,… … Let ABC be a circle; and let ACB, AFB be Z s in thesame segment. Then the Zs ACB, AFB are equal. Let 0 be the centre of the circle. Join OA, OB. Then the ZAOB at the centre is double of each of the Zs ACB, AFB at the circumference; (IV., 5,) .. the Zs ACB, AFB are equal. BOOK IV. Angles in a…
Geometry · Geometry, Plane
Internet Archive · Western University Libraries · Public Domain Mark 1.0. Free to use for anything.
