 | Robert Louis Short, William Harris Elson - Mathematics - 1911 - 216 pages
...264 THEOREM LXIX 262. An inscribed angle is measured by one half its intercepted 270 THEOREM LXX 263. The angle formed by a tangent and a chord is measured by one half the intercepted arc 271 THEOREM LXXI 264. The angle formed by two intersecting chords is measured... | |
 | Geometry, Plane - 1911 - 192 pages
...sides and the middle points of the two diagonals are the vertices of a parallelogram. 2. Prove that the angle formed by a tangent and a chord is measured by one-half the intercepted arc. Two circles intersect at A and B. The two tangents at A are drawn, cutting... | |
 | Edward Rutledge Robbins - Geometry, Plane - 1915 - 282 pages
...water as the principle of all things. THALES BOOK II. PLANE GEOMETRY PROPOSITION XXV. THEOREM 241. The angle formed by a tangent and a chord is measured by half the intercepted arc. Given: OO, tangent TN; chord AP; Z TPA ; arc PA. To Prove : Z TPA is measured by J... | |
| |
BEC, taken together, are measured by half the circumference ; hence their sum is equal to two right angles. 
