Elements of Geometry and Trigonometry |
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Page 10
... vertex A ; sometimes by the three letters BAC , or CAB , the letter at the vertex being always placed in the middle . Angles , like all other quantities , are susceptible of addition , subtraction , multiplication , and division . Thus ...
... vertex A ; sometimes by the three letters BAC , or CAB , the letter at the vertex being always placed in the middle . Angles , like all other quantities , are susceptible of addition , subtraction , multiplication , and division . Thus ...
Page 12
... vertex of the angle . The sign The sign is called minus : it indicates subtraction . Thus , A + B , represents the sum of the quantities A and B ; A - B represents their difference , or what remains after B is taken from A ; and A - B + ...
... vertex of the angle . The sign The sign is called minus : it indicates subtraction . Thus , A + B , represents the sum of the quantities A and B ; A - B represents their difference , or what remains after B is taken from A ; and A - B + ...
Page 20
... vertex of an isosceles triangle to the middle point of its base , is perpendicular to the base , and divides the angle at the vertex into two equal parts . In a triangle which is not isosceles , any side may be assumed indifferently as ...
... vertex of an isosceles triangle to the middle point of its base , is perpendicular to the base , and divides the angle at the vertex into two equal parts . In a triangle which is not isosceles , any side may be assumed indifferently as ...
Page 30
... vertex of any one angle A , diagonals B AC , AD , AE , AF , be drawn to the vertices of all the opposite angles , it is plain that the poly- gon will be divided into five triangles , if it has seven sides ; into six triangles , if it ...
... vertex of any one angle A , diagonals B AC , AD , AE , AF , be drawn to the vertices of all the opposite angles , it is plain that the poly- gon will be divided into five triangles , if it has seven sides ; into six triangles , if it ...
Page 41
... vertex in the circumference , and is formed by two chords . B * Note . In common language , the circle is sometimes confounded with its circumference : but the correct expression may always be easily recurred to if we bear in mind that ...
... vertex in the circumference , and is formed by two chords . B * Note . In common language , the circle is sometimes confounded with its circumference : but the correct expression may always be easily recurred to if we bear in mind that ...
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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