Solid Geometry

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Rand, McNally, 1922 - Geometry, Solid - 218 pages
 

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Page 25 - A straight line perpendicular to one of two parallel planes is perpendicular to the other also.
Page 50 - A Plane Surface, or a Plane, is a surface in which, if any two points be taken, the straight line joining these points will lie wholly in the surface.
Page 187 - The exterior angle of a triangle is equal to the sum of the two non-adjacent interior angles.
Page 183 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq.
Page 197 - The internal bisector of an angle of a triangle divides the opposite side internally in the ratio of the sides containing the angle, and likewise the external bisector externally.
Page 198 - If two polygons are composed of the same number of triangles, similar each to each and similarly placed, the polygons are similar.
Page 25 - If two planes are perpendicular to each other, a line drawn in one of them perpendicular to their intersection is perpendicular to the other.
Page 195 - Multiplying or dividing both terms of a ratio by the same number does not change the value of the ratio.
Page 99 - If two triangles have two angles, and the included side of the one equal to two angles and the included side of the other, they are equal in all their parts.
Page 197 - If a perpendicular is drawn from the vertex of the right angle to the hypotenuse of a right triangle: 1st.

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