First Lessons in Geometry: Upon the Model of Colburn's First Lessons in ArithmeticJ. Munroe & Company, 1847 - 164 lappuses |
Citi izdevumi - Skatīt visu
Bieži izmantoti vārdi un frāzes
aACB AB² aBAC ABCD AC² adjacent angles allels alternate-interior altitude angles equal angular point Arithmetic base and altitude BC² bend bisect centre curve describe arcs cutting diagonals diedral angles difference dimensions direction distance distinct straight lines divergence divided draw equal angles equal sides equiangular equiangular polygons equilateral exterior figure GEOM Geometry given angle greater hypotenuse identical triangles inches interior angles isosceles triangle Join lelogram length less line drawn magnitudes multiplied oblique obtain obtuse paral parallel parallelogram perpendicular plane polygon PROPOSITION quadrilateral radius rectangle Required right angles right triangle rods Show solid angles square subtending subtract surface tABC THEOR theorem third three angles triangle ABC triangle is equal Triangles agreeing unequal unlike angles vertex
Populāri fragmenti
16. lappuse - He had demonstrated, unaided by any book or teacher, the proposition, that the sum of the angles of a plane triangle is equal to two right angles.
125. lappuse - Most good practical workmen have several means for getting the cut of the mitre, and to them this demonstration will appear unnecessary, but I have seen many men make sad blunders, for want of knowing this simple rule. PROBLEM 12.
22. lappuse - A CIRCLE is a plane figure bounded by a curved line, all the points of which are equally distant from a point within called the centre; as the figure ADB E.
21. lappuse - ... that the angle inscribed in a semicircle is a right angle, and to have testified his joy by a sacrifice to the Muses!
156. lappuse - Side subtending the Obtuse Angle, is Greater than the Sum of the Squares of the other two Sides, by Twice the Rectangle of the Base and the Distance of the Perpendicular from the Obtuse Angle.
77. lappuse - A polygon of three sides is a triangle ; of four, a quadrilateral; of five, a pentagon ; of six, a hexagon ; of seven, a heptagon; of eight, an octagon; of nine, a nonagon; of ten, a decagon; of twelve, a dodecagon.
4. lappuse - Theory soon descends to guide and assist the operations of practice. To the geometrical speculations of the Greeks, we may distinctly trace whatever progress the moderns have been enabled to achieve in mechanics, navigation, and the various complicated arts of life. A refined analysis has unfolded the harmony of the celestial motions, and conducted the philosopher, through a maze of intricate phenomena, to the great laws appointed for the government of the Universe.
23. lappuse - Of four-sided figures, a square is that which has all its sides equal, and all its angles right angles.
24. lappuse - If the product of two quantities be equal to the product of two others, two of them may be made the extremes and the other two the means of a proportion.
99. lappuse - Lines drawn from a point within a triangle to the extremities of the base include an angle greater than the vertical angle of the triangle, (v.