PLANE AND SOLID GEOMETRY

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Passatges populars

Pàgina 35 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Pàgina 80 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. A D A' Hyp. In triangles ABC and A'B'C', To prove AABC A A'B'C' A'B' x A'C ' Proof. Draw the altitudes BD and B'D'.
Pàgina 139 - If a straight line is perpendicular to each of two straight lines at their point of intersection, it is perpendicular to the plane of those lines.
Pàgina 17 - The sum of all the angles of a polygon is equal to twice as many right angles as the polygon has sides, less two.
Pàgina 176 - The radius of a sphere is a straight line, drawn from the centre to any point of the...
Pàgina 182 - Every section of a sphere, made by a plane, is a circle.
Pàgina 28 - If two triangles have two sides of the one equal respectively to two sides of the other, but the included angle of the first greater than the included angle of the second, then the third side of the first is greater than the third side of the second. Given A ABC and A'B'C ' with Proof STATEMENTS Apply A A'B'C ' to A ABC so that A'B
Pàgina 165 - ... bases simply : hence two prisms of the same altitude are to each other as their bases. For a like reason, two prisms of the same base are to each other as their altitudes.
Pàgina 29 - ... to two sides of the other, but the third side of the first greater than the third side of the second, the angle opposite the third side of the first is.
Pàgina 13 - If equals be added to unequals, the wholes are unequal. V. If equals be taken from unequals, the remainders are unequal. VI. Things which are double of the same, are equal to one another.