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ABCD adjacent altitude angles are equal base bisect bisector called centre chord circle circumference circumscribed coincide common cone construct contained cylinder diagonals diameter diedral angles difference distance divided draw drawn edges equal equally distant equiangular equilateral equivalent EXERCISES faces fall figure follows formed four frustum given greater hence homologous included inscribed interior angles intersection isosceles join known lateral less Likewise limit mean measured meet number of sides oblique one-half opposite parallel parallelogram parallelopiped passes perimeter perpendicular plane polyedron polygon portion prism PROBLEM proportional PROPOSITION prove pyramid quantity radii radius ratio rectangle regular polygon respectively right angles right triangle segments Show sides similar sphere spherical square straight line SUGGESTION surface tangent THEOREM third triangle triangle ABC unit vertex vertices volume
Σελίδα 46 - PERIPHERY of a circle is its entire bounding line ; or it is a curved line, all points of which are equally distant from a point within called the centre.
Σελίδα 82 - If any number of quantities are proportional, any antecedent is to its consequent as the sum of all the antecedents is to the sum of all the consequents. Let a : b = c : d = e :f Now ab = ab (1) and by Theorem I.
Σελίδα 192 - A sphere is a solid bounded by a surface all points of which are equally distant from a point within called the centre.
Σελίδα 108 - Two triangles having an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles.
Σελίδα 146 - A STRAIGHT line is perpendicular to a plane, when it is perpendicular to every straight line which it meets in that plane.
Σελίδα 30 - In an isosceles triangle, the angles opposite the equal sides are equal.
Σελίδα 80 - In any proportion the terms are in proportion by Composition ; that is, the sum of the first two terms is to the first term as the sum of the last two terms is to the third term.
Σελίδα 79 - If the product of two quantities is equal to the product of two others, one pair may be made the extremes, and the other pair the means, of a proportion. Let ad = ос.