Elements of Plane and Spherical Trigonometry: With Practical Applications

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R. S. Davis, 1861 - 490 sider
 

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Side 17 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Side 55 - If two triangles have two angles of the one equal to two angles of the other, each to each, and also one side of the one equal to the corresponding side of the other, the triangles are congruent.
Side 153 - The convex surface of the cylinder is equal to the circumference of its base multiplied by its altitude (Prop.
Side 28 - 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.
Side 116 - The radius of a sphere is a straight line, drawn from the centre to any point of the...
Side 96 - If a straight line is perpendicular to each of two straight lines at their point of intersection, it is perpendicular to the plane of those lines.
Side 142 - The convex surface of this prism is equal to the perimeter of its base multiplied by its altitude, AG (Prop.
Side 174 - Find the area of the sector having' the same arc with the segment, and also the area of the triangle formed by the chord of the segment and the radii of the sector. Then...
Side 14 - Straight lines which are parallel to the same line are parallel to each other. Let the straight lines AB, CD be each parallel to the line EF ; then are they parallel to each other.
Side 93 - STRAIGHT line is perpendicular to a plane, when it is perpendicular to every straight line which it meets in that plane.

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