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ABC and DEF ABCD adjacent angles altitude angle formed angles are equal angles compare apothem arc intercepted bisects called central angle chord circle whose center circumference compare in length Construct a square Construct a triangle Data diagonals diameter distance divided equal angles equal circles equidistant equilateral triangle exterior extremities FGHJK figure Find the locus geometry given line given point greater Hence homologous sides hypotenuse inscribed angle interior angles intersecting isosceles trapezoid isosceles triangle line drawn measured meet middle point milne's number of sides opposite sides parallel lines parallelogram perimeter produced proportion prove q.e.d. Proposition q.e.f. Proof quadrilateral radii radius ratio rect rectangle formed regular inscribed regular polygon rhombus right angle right triangle secant similar polygons square equivalent straight angle subtended tangent Theorem third side transversal trapezoid triangle ABC triangles are equal triangles compare unequal vertex vertical angle
Page 67 - The line joining the middle points of two sides of a triangle is parallel to the third side and equal to half of the third side.
Page 46 - Any exterior angle of a triangle is equal to the sum of the two opposite interior angles.
Page 74 - If two parallel lines are cut by a third straight line, the sum of the two interior angles on the same side of the transversal is equal to two right angles, (p.
Page 64 - From 56 and 57 the pupils should learn that two triangles are equal in every respect (a) when two sides and the included angle of one are equal to two sides and the included angle of the other...
Page 53 - If two angles of a triangle are unequal, the sides opposite are unequal, and the greater side is opposite the greater angle.
Page 61 - If the opposite sides of a quadrilateral are equal, the figure is a parallelogram.
Page 126 - DE and on the same side of it ; but equal triangles on the same base, and on the same side of it, are between the same parallels ; [I.
Page 90 - Theorem. In the same circle, or in equal circles, equal chords are equally distant from the center; conversely, chords equally distant from the center are equal.