Plane and Solid GeometryGinn, 1899 - 473 sider |
Inni boken
Resultat 1-5 av 71
Side 5
... opposite of a theorem is obtained by making both the hypothesis and the conclusion negative . Thus , A theorem : Its opposite : If A is B , then C is D. If A is not B , then C is not D. 31. The converse of a theorem is obtained by ...
... opposite of a theorem is obtained by making both the hypothesis and the conclusion negative . Thus , A theorem : Its opposite : If A is B , then C is D. If A is not B , then C is not D. 31. The converse of a theorem is obtained by ...
Side 9
... opposite directions from the point C ( Fig . 5 ) . A ← B FIG . 5 . Every straight line , as AB , may be considered as extending in either of two opposite directions , namely , from A towards B , which is expressed by AB , and read ...
... opposite directions from the point C ( Fig . 5 ) . A ← B FIG . 5 . Every straight line , as AB , may be considered as extending in either of two opposite directions , namely , from A towards B , which is expressed by AB , and read ...
Side 11
... opposite directions , so as to be in the same straight line , the angle is called a straight angle . A C FIG . 12 . B Thus , the angle formed at C ( Fig . 12 ) with its sides CA and CB extend- ing in opposite directions from C is a ...
... opposite directions , so as to be in the same straight line , the angle is called a straight angle . A C FIG . 12 . B Thus , the angle formed at C ( Fig . 12 ) with its sides CA and CB extend- ing in opposite directions from C is a ...
Side 17
... opposites are true . Hence , § 33 91. COR . 1. If the exterior sides of two adjacent angles are not in a straight line , these angles are not supplementary . 92. COR . 2. If two adjacent angles are not supplementary , their exterior ...
... opposites are true . Hence , § 33 91. COR . 1. If the exterior sides of two adjacent angles are not in a straight line , these angles are not supplementary . 92. COR . 2. If two adjacent angles are not supplementary , their exterior ...
Side 30
... opposite interior angles . Scalene . Isosceles . Equilateral . 120. A triangle is called a scalene triangle when no two of its sides are equal ; an isosceles triangle , when two of its sides are equal ; an equilateral triangle , when ...
... opposite interior angles . Scalene . Isosceles . Equilateral . 120. A triangle is called a scalene triangle when no two of its sides are equal ; an isosceles triangle , when two of its sides are equal ; an equilateral triangle , when ...
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Vanlige uttrykk og setninger
ABCD AC² adjacent angles altitude angles are equal apothem axis bisector bisects called centre chord circumference circumscribed coincide construct cylinder denote diagonals diameter dihedral angles divided Draw equiangular equidistant equilateral triangle equivalent exterior angle feet Find the area Find the locus frustum given circle given line given point given straight line greater Hence homologous homologous sides hypotenuse inches inscribed intersecting isosceles triangle lateral area lateral edges limit middle point number of sides opposite parallel lines parallelogram parallelopiped perimeter perpendicular plane MN polyhedron prism prismatoid Proof proportional prove Q. E. D. PROPOSITION quadrilateral radii radius ratio rectangle regular polygon respectively rhombus right angle right circular right triangle segments similar slant height sphere spherical square surface tangent tetrahedron THEOREM trapezoid triangle ABC triangle is equal trihedral vertex vertices
Populære avsnitt
Side 274 - If two planes are perpendicular to each other, a straight line drawn in one of them, perpendicular to their intersection, is perpendicular to the other.
Side 50 - If the opposite sides of a quadrilateral are equal, the figure is a parallelogram.
Side 66 - 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...
Side 41 - If two angles of a triangle are unequal, the sides opposite are unequal, and the greater side is opposite the greater angle.
Side 169 - In any triangle the product of two sides is equal to the product of the diameter of the circumscribed circle by the altitude upon the third side.
Side 360 - A sphere is a solid bounded by a surface all points of which are equally distant from a point within called the centre.
Side 71 - The sum of the perpendiculars dropped from any point in the base of an isosceles triangle to the legs, is equal to the altitude upon one of the arms.
Side 156 - In a series of equal ratios, the sum of the antecedents is to the sum of the consequents as any antecedent is to its consequent.
Side 71 - 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.
Side 383 - Hence the two last are right angles ; hence the arc drawn from the vertex of an isosceles spherical triangle to the middle of the base, is at right angles to the base, and bisects the vertical angle.