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acute angles added adjacent base bisect bounded called centre chords circle circumference common concluded curved demonstration describe diagonal diameter discover double draw drawn edges equal equal angles equilateral exterior angle extremities faces fall figure four given greater Hence inscribed interior intersect isosceles join known less LESSON likewise lines a b M.-Hence M.—What manner master meet object observe obtuse angle opposite angles P.-The angle P.-They parallel parallel lines parallelogram passes perpendicular plane angles point of contact produced pupils pyramid quadrilateral figure rectangle rectangle contained relation remaining respecting result right angles sides similar slates solid angles sphere square straight line subtending surface tangent third triangle triangle abc truth twice the rectangle unequal writing
Página 98 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.
Página 134 - In obtuse-angled triangles, if a perpendicular be drawn from either of the acute angles to the opposite side produced, the square on the side subtending the obtuse angle, is greater than the squares on the sides containing the obtuse angle, by twice the rectangle contained by the side...
Página 137 - In every triangle, the square of the side subtending either of the acute angles is less than the squares of the sides containing that angle, by twice the rectangle contained by either of these sides, and the straight line intercepted between the perpendicular let fall upon it from the opposite angle, and the acute angle.