 | ...to the radius through the point of contact. 7. Angles in the same segment of a circle are equal. 8. The opposite angles of a quadrilateral inscribed in a circle are together equal to two right angles. 9. The angle between the tangent at any point of a circle and a chord through that point is equal to... | |
 | ...a segment. 2. The angles in a segment are equal. 3. The angle in a semicircle is a right angle. 4. The opposite angles of a quadrilateral inscribed in...a circle are together equal to two right angles*. * This can be seen from the figure 60, and is proved more fully in Section 13. 5. If the opposite angles... | |
 | McGill University - 1868
...half the base, and twice the square of the bisecting line. 4. Find the centre of a given circle. 5. The opposite angles of a quadrilateral inscribed in a circle are together equal to two right angles. 6. Divide a right line similarly to a given divided line, a. Divide a right line into n equal parts.... | |
 | ...triangle on the opposite sides are concurrent. 7. Angles in the same segment of a circle are equal. 8. The opposite angles of a quadrilateral inscribed in a circle are together equal to two right angles. 9. The angle between the tangent at any point of a circle and a chord through that point is equal to... | |
 | 1891
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The opposite angles of a quadrilateral inscribed in a circle are together equal to two right angles, with converse. 
