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75 cents ABCD AC is equal allel altitude angle ABC angle ACB angle BAC Anthon's base BCDEF bisected chord circle circumference cone contained convex surface curve described diameter dicular draw drawn ellipse equal angles equal to AC equally distant equiangular equivalent foci four right angles frustum greater Hence Prop hyperbola inscribed intersection join latus rectum Let ABC major axis mean proportional measured by half meet Muslin number of sides ordinate OREM parabola parallelogram parallelopiped pendicular perimeter perpen perpendicular plane MN prism PROPOSITION pyramid radii radius ratio rectangle regular polygon right angles right angles Prop Scholium segment Sheep extra side AC similar slant height solid angle sphere spherical triangle square straight line subtangent tangent THEOREM triangle ABC vertex vertices
Página 60 - Any two rectangles are to each other as the products of their bases by their altitudes.
Página 11 - A rhombus, is that which has all its sides equal, but its angles are not right angles.
Página 63 - IF a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the' rectangle contained by the parts.
Página 18 - BC common to the two triangles, which is adjacent to their equal angles ; therefore their other sides shall be equal, each to each, and the third angle of the one to the third angle of the other, (26.
Página 10 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Página 15 - If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line.
Página 17 - If two triangles have two sides and the included angle of the one, equal to two sides and the included angle of the other, each to each, the two triangles will be equal.