 Angles at a point. — If a straight line stands on another straight line, the sum of the two angles so formed is equal to two right angles; and the converse. If two straight lines intersect, the vertically opposite angles are equal. Parallel straight...  Bulletin - Page 171915Full view - About this book
 | 480 pages
...so as to make equal angles with two intersecting ZOBX lines OX and OY. Fig. 22. SUMMARY OF RESULTS If a straight line stands on another straight line,...two angles so formed is equal to two right angles. If any number of straight lines meet at a point, the sum of all the angles made by consecutive lines... | |
 | G. P. West - Geometry - 1965 - 362 pages
...of theorems marked f are not required by some examining bodies. Angles at a Point PAGE ^THEOREM i. If a straight line stands on another straight line,...two angles so formed is equal to two right angles. 234 ^THEOREM 2. If the sum of two adjacent angles is equal to two right angles, the exterior arms of... | |
 | 464 pages
...how many right angles has the line rotated? (ii) Through how many degrees? FACT A,. [Theorem I. 1.] If a straight line stands on another straight line,...two angles so formed is equal to two right angles. Ex. 117. If, in fig. 29, / AOB=57°, what is / BOC ? Check by drawing and measuring. tEx. 118. (i)... | |
 | 102 pages
...or polygon are called its vertices. (p. 37.) TABLE OF FACTS. ANGLES AT A POINT. FACT Ai [Th. 1. 1]. If a straight line stands on another straight line,...two angles so formed is equal to two right angles- (p. 24.) FACT A2 [Th. i. 1, Cor.]. If any number of straight lines meet at a point, the sum of all... | |
 | University of Bombay - 1914 - 1228 pages
...Description of a segment of a circle on a given straight line containing a given angle. SCHEDULE B. Angles at a point, If a straight line stands on another straight line, the sum of the two angles so fomiíd is equal to two right angles ; and the converse. If two etraight lines intersect, the vertically... | |
 | 352 pages
...in the Appendix, but these are hard and should be postponed. Angles at a point. FACT Aj [Th. I. 1]. If a straight line stands on another straight line, the sum of the two angles so formed is equal ta two right angles, (p. 24.) FACT B [Th. I. 2]. If the sum of two adjacent angles is equal to two... | |
 | University of Bombay - 1908 - 954 pages
...Description of a segment oE a circle on a given straight line containing a given angle. SCHEDULE B. Angles at a point. If a straight line stands on another straight line, the sum of the two jingles so formed is equal to two right angles ; and the converse. If two straight lines intersect,... | |
 | University of Bombay - 1911 - 1028 pages
...of a segment oE a circle on a given straight line containinir a giyen angle. ' H SCHEDULE B. Angle* at a point. If a straight line stands on another straight line, the sum of the two •ngles so formed is equal to two right angles ; and the converse. If two straight lines intersect,... | |
 | Oxford and Cambridge Schools Examination Board - 1928 - 146 pages
...Continue to turn by the left till you face B. What is the total of the two turns? BO C Theorem 2. If one straight line stands on another straight line, the sum of the two angles so formed is two right angles. Example. In the figure OE bisects (divides into two equal parts) Z.COD. Find LEOD.... | |
 | 138 pages
...Continue to turn by the left till you face B. What is the total of the two turns ? B O Theorem 2. If one straight line stands on another straight line, the sum of the two angles so formed is two right angles. Example. In the figure OE bisects (divides into two equal parts) L COD. Find LEOD.... | |
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