## Elements of Geometry and Trigonometry |

### From inside the book

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... Angles , like all other quantities , are susceptible of addition , subtraction , multiplication , and division ...

... Angles , like all other quantities , are susceptible of addition , subtraction , multiplication , and division ...

**adjacent angles**BAC , BAD , equal to each other , each of those angles is called a right angle ; and the line AB is ... Page 11

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**angles**right**angles**. A And lastly , the trapezoid , only two of whose sides are parallel . 18. A diagonal is a line which joins the ver- tices of two**angles**not**adjacent**to each other . Thus , AF , AE , AD , AC , are diagonals . B F 19 ... Page 14

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**adjacent angles**will be equal to two right angles . E B Let the straight line DC meet the straight line AB at C , then will the angle ACD + the angle DCB , be equal to two right angles . At the point C , erect CE perpendicular to AB . The ... Page 15

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**adjacent angles**equal to two right angles , the two straight lines which are met , will form one and the same straight line . Let the straight line CD meet the two lines AC , CB , at their common point C , making the sum of the two ... Page 25

... angles on the same side of the line met , equal to two right angles , the two lines will be parallel . Let the two ...

... angles on the same side of the line met , equal to two right angles , the two lines will be parallel . Let the two ...

**adjacent angles**equal ; therefore , they are themselves equal , and the angle GEA is equal to the angle GFB ...### Other editions - View all

### Common terms and phrases

adjacent adjacent angles altitude angle ACB angle BAC ar.-comp base multiplied bisect Book centre chord circ circumference circumscribed common cone consequently convex surface cylinder diagonal diameter dicular distance draw drawn equal angles equally distant equation equiangular equivalent figure formed four right angles frustum given angle given line gles greater homologous sides hypothenuse inscribed circle inscribed polygon intersection less Let ABC let fall logarithm measured by half number of sides opposite parallelogram parallelopipedon pendicular perimeter perpen perpendicular plane MN polyedron polygon ABCDE prism proportional PROPOSITION pyramid quadrant quadrilateral quantities radii radius ratio rectangle regular polygon right angled triangle S-ABC Scholium secant secant line segment side BC similar solid angle solid described sphere spherical polygon spherical triangle square described straight line tang tangent THEOREM triangle ABC triangular prism vertex