Plane and Solid Geometry

Scott, Foresman, 1918 - 436 σελίδες

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Δημοφιλή αποσπάσματα

Σελίδα 169 - In any triangle, the square of a side opposite an acute angle is equal to the sum of the squares of the other two sides diminished by twice the product of one of those sides and the projection of the other side upon it.
Σελίδα 75 - The straight line joining the middle points of two sides of a triangle is parallel to the third side, and equal to half of it.
Σελίδα 19 - If two triangles have two angles and the included side of one equal respectively to two angles and the included side of the other, the triangles are congruent.
Σελίδα 155 - The area of a parallelogram is equal to the product of its base and its height: A = bx h.
Σελίδα 89 - Two triangles are congruent if two sides and the included angle of one are equal respectively to two sides and the included angle of the other.
Σελίδα 164 - Two triangles which have an angle of one equal to the supplement of an angle of the other are to each other as the products of the sides including the supplementary angles.
Σελίδα 155 - ... any two parallelograms are to each other as the products of their bases by their altitudes. PROPOSITION V. THEOREM. 403. The area of a triangle is equal to half the product of its base by its altitude.
Σελίδα 248 - ... as the squares of their radii, or as the squares of their...
Σελίδα 296 - Axiom. Through a given point only one straight line can be drawn parallel to a given straight line.
Σελίδα 39 - In an isosceles triangle the angles opposite the equal sides are equal.

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