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altitude angles are equal arms base bisect bisector called chord circle coincide common CONCLUSION construction contained CoROLLARY corresponding describe determine diagonals difference divided draw drawn equal equiangular equilateral equivalent ExERCISEs exterior figure four given given point greater half Hence HYPOTHESIS included angle inscribed intercept interior angles intersection Inversion isosceles Join less magnitudes mean meet multiples pair parallel parallelogram pass perigon perimeter perpendicular plane pole polygon PROBLEM produced PROOF proportional proved radii radius ratio rectangle regular polygon REQUIRED respectively right angle sect segment sides similar sphere spherical triangle square straight angle supplemental surface symmetrical taken tangent THEOREM thing third trace transversal triangle triangles are congruent turned unequal vertex vertices whole
Pagina 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.
Pagina 24 - A right-angled triangle is one which has a right angle. The side opposite the right angle is called the hypothenuse.
Pagina 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.
Pagina 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.
Pagina 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.
Pagina 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.
Pagina 13 - An Acute Angle is one which is less than a right angle.
Pagina 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...