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ABCD altitude angles are equal arms base bisect bisector called chord circle coincide common CONCLUSION congruent construction contained COROLLARY corresponding describe determine diagonals diameter difference divided double draw drawn equal equiangular equilateral equivalent EXERCISES exterior angle figure four given given point greater half Hence HYPOTHESIS inscribed intercepted interior intersection Inversion isosceles Join less magnitudes mean meet multiples mutually opposite sides pair parallel parallelogram pass perigon perimeter perpendicular plane polygon PROBLEM produced PROOF proportional proved radii radius ratio rectangle regular polygon REQUIRED respectively right angle Rule sect sector segment sides similar sphere spherical square straight angle subtended supplemental surface symmetry taken tangent THEOREM thing third transversal triangle turned unequal vertex vertices whole
Página 44 - If two triangles have two sides of one equal respectively to two sides of the other, but the included angle of the first triangle greater than the included angle of the second, then the third side of the first is greater than the third side of the second.
Página 24 - A right-angled triangle is one which has a right angle. The side opposite the right angle is called the hypothenuse.
Página 190 - 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.
Página 270 - BC with the same radius. Then a line through A touching this arc will be the required parallel. Or, use a straight edge and triangle.
Página 101 - If there be two straight lines, one of which is divided into any number of parts, the rectangle contained by the two straight lines is equal to the rectangles contained by the undivided line, and the several parts of the divided line.
Página 266 - If two triangles have two sides and the included angle of one equal respectively to two sides and the included angle of the other, the triangles are equal.
Página 13 - An Acute Angle is one which is less than a right angle.
Página 104 - If a straight line be bisected, and produced to any point ; the rectangle contained by the whole line thus produced, and the part of it produced, together with the square...