## Elements of Geometry and Trigonometry |

### From inside the book

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**called**points : a point , there- fore , has neither length , breadth , nor thickness , but position only . 3. A straight line is the shortest distance from one point to another . 4. Every line which is not straight , or composed of ... Page 10

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**called**a rectilineal figure , or polygon , and the lines themselves , taken together , form the contour , or perimeter of the polygon . 14. The polygon of three sides , the simplest of all , is**called**a triangle ; that of four sides , a ... Page 11

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**called**the hypothenuse . Thus , in the triangle ABC , right - angled at A , the side BC is the hypothenuse . B 17. Among the quadrilaterals , we distinguish : The square , which has its sides equal , and its an- gles right - angles ... Page 12

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**called**plus : it indicates addition . To signify that A is greater than B , the expression A > B is used ; the smaller quantity being always at the vertex of the angle . The sign The sign is**called**minus : it indicates subtraction ... Page 35

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**called**the terms of the proportion . The first and last terms are**called**the two extremes , and the second and third terms , the two means . 3. Of four proportional quantities , the first and third are**called**the antecedents , and the ...### 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 convex surface Cosine Cotang cylinder diagonal diameter dicular distance draw drawn equal angles equally distant equiangular equivalent figure formed four right angles frustum given angle given line gles greater homologous sides hypothenuse inscribed polygon intersection less Let ABC let fall logarithm measured by half number of sides oblique lines 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 sine solid angle solid described sphere spherical polygon spherical triangle square described straight line tang tangent THEOREM triangle ABC triangular prism vertex