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ABCD altitude angle base bisected bisectors called chord circle circumference circumscribed common cone congruent considered construct converse convex COROLLARIES corresponding cylinder Definitions determined diagonals diameter difference dihedral angle distance divided draw drawn edges equal equidistant equilateral Exercises faces figure Find four frustum geometry given given line given point greater half Hence inscribed intersecting joining lateral length less locus mean measure meet Note oblique opposite sides parallel parallelogram pass perigon perpendicular placed plane polygon polyhedral angle prism Problem produced Proof prop proportional PROPOSITION prove pyramid quadrilateral radii radius ratio rectangle regular represent Required respectively right angle segments sides similar Similarly solid space sphere spherical square step straight line student Suppose surface tangent Theorem transverse triangle true vertex vertices volume
Page 104 - The projection of a point on a line is the foot of the perpendicular from the point to the line. Thus A
Page 118 - In the same circle, or in equal circles, if two arcs are equal, their central angles are equal; and conversely.
Page 147 - To draw a tangent to a given circle from a given point.
Page 202 - II, cor. 1. 2. The area of a rectangle equals the product of its base and altitude. That is, the number which represents Its square units of area is the product of the two numbers which represent its base and altitude. For in prop. II, if R' = 1, the square unit of area, then a' and 6' must each equal 1, the unit of length.
Page 186 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Page 317 - A plane surface, or a plane, is a surface in which, if any two points are taken, the straight line joining these points lies wholly in the surface.
Page 39 - If two triangles have two sides of the one respectively equal to two sides of the other, and the included angles unequal, the third sides are unequal, and the greater third side belongs to the triangle having the greater included angle.
Page 46 - Two intersecting straight lines cannot both be parallel to the same straight line.