Elementary Geometry

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Swan Sonnenschein & Company, 1902 - Geometry - 268 pages
 

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Page 77 - A line segment connecting a vertex of a triangle and the midpoint of the opposite side is called a median of the triangle.
Page 223 - The sum of the squares on the sides of a parallelogram is equal to the sum of the squares on the diagonals.
Page 111 - America, but know that we are alive, that two and two make four, and that the sum of any two sides of a triangle is greater than the third side.
Page 78 - To draw a straight line at right angles to a given straight line, from a given point in the same. Let AB be...
Page 35 - ... the three angles of a triangle are together equal to two right angles, although it is not known to all.
Page 157 - Any two sides of a triangle are together greater than the third side.
Page 158 - One of these is the proposition that any two sides of a triangle are greater than the third side.
Page 35 - Obtuse Angle. An angle greater than a right angle and less than a straight angle is called an obtuse angle.
Page 130 - If the vertices of the angles of a polygon lie on a circumference, the polygon is said to be inscribed in the circle, and the circle is called a circumscribed circle.
Page 111 - The sum of the perpendiculars from any point within an equilateral triangle to the three sides is equal to the altitude of the triangle (Fig.

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