Inventional Geometry: A Series of Problems, Intended to Familiarize the Pupil with Geometrical Conceptions, and to Exercise His Inventive FacultyD. Appleton and Company, 1881 - 97 páginas |
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66 APPLETONS adjacent angles angular points arc is called arithmetic arithmetic mean arrange the surfaces base BOND STREET boundaries breadth card a hollow circumference construct cube curve diameter Dictionary dimensions divide a circle divide a line divide an equilateral dodecagon duodecimals edition ellipse equal and similar equal sectors equilateral triangle find the area four equal geometry GEORGE PARK FISHER Give a plan give a sketch gles HERBERT SPENCER hexahedron icosahedron Illustrations isosceles triangle length line drawn line of chords line of sines line of tangents means nonagon number of degrees octagon octahedron pentagon perpendicular piece of card place a circle place a hexagon place a square polygon Price protractor pupil pyramid quadrant quadrilaterals radii radius ratio READER rectangle reëntrant angle rhomboid rhombus right angle right-angled triangle secant sides is called solid spheroid square inches square yard takes the name tetrahedron touch trapezium versed sine write its name zoid
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Página 43 - TRIANGLES upon the same base, and between the same parallels, are equal to one another.
Página 42 - A body which has four plane, equal, and similar surfaces, is called a tetrahedron. 131. Make a hollow tetrahedron of one piece of cardboard, and show on paper how you arrange the surfaces to fit each other, and give a sketch of the tetrahedron when made. You know how to fit a square in a circle. 132. Can you fit a square around a circle ? When two triangles have the angles of one respectively equal to the angles of the other, but the sides of the one longer or shorter respectively than the sides...