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The opposite angles of a quadrilateral inscribed in a circle are together equal to two right angles, with converse.
Proceedings of the Edinburgh Mathematical Society - Página 9
por Edinburgh Mathematical Society - 1894
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## Calendar

...of a parallelogram is equal to the sum of the squares on the sides. 12. The opposite angles of every quadrilateral inscribed in a circle are together equal to two right angles. ABC is a triangle : AD, BE are perpendicular to BC, AC respectively : prove that the triangle ODE is...
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## The calendar of the University college of Wales

...that parallelograms on the same base and between the same parallels are equal to one another. 8. Prove that the opposite angles of a quadrilateral inscribed in a circle are supplementary. 9. If 0 be a point within a triangle ABC, such that the angles BOG, COA, AOB are equal,...
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## Calendar

...the centre of a circle is double an angle at the circumference standing on the same arc, and deduce that the opposite angles of a quadrilateral inscribed in a circle are supplementary. Two circles ABC, ABD, with centres 0 and Q, intersect at right angles ; AC and AD are...
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## Transactions, Volumen14

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## A Shorter Geometry

...its angular points, and measure the length of its radius. 7. Prove that the opposite angles of any quadrilateral inscribed in a circle are together equal to two right angles. ABCD is a parallelogram and the circle described about the triangle ABC cuts CD, or CD produced, in...
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## The Calendar of the University of Toronto ...

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## Report of the examination held (Dec. 1859)-73

...which does not pass through the centre it shall cut it at right angles. 10. The opposite angles of any quadrilateral inscribed in a circle are together equal to two right angles. II. Describe an isosceles triangle having each angle at the base double the third angle. 12. If two...
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## Annual Report of the Public Schools of the Province of British Columbia

...equal to when the side subtends an obtuse angle ? (b.) What is a Gnomon ? 6. The opposite angles of any quadrilateral inscribed in a circle are together equal to two right angles. TRICONOMETRY. 1. (a.) The number of degrees in a certain angle added to the number of grades is 152...
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## The London University Calendar

London univ - 1874
...internally, the line joining their centres passes through the point of contact. 7. The opposite angles of any quadrilateral inscribed in a circle are together equal to two right angles. 8. A segment of a circle being given, find the complete circle of which it is a segment. 9. Prove that...
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## Glasgow University Calendar for the Year ...

University of Glasgow - 1901
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