Inventional Geometry: A Series of Problems, Intended to Familiarize the Pupil with Geometrical Conceptions, and to Exercise His Inventive Faculty
D. Appleton and Company, 1881 - 97 páginas
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angle APPLETON arithmetic arrange assistance base body boundaries breadth calculation called centre chord circle circumference Cloth construct contains cube curve determine diagonal diameter Dictionary dimensions distance divide divide a line draw edition Education ellipse equal and similar equilateral triangle expressed extremities face Fathers feet figure find the area four equal geometry give a sketch Given greater half hexagon Illustrations inches Introduction invent isosceles triangle kind length less line of chords means measure meet method Natural octagon parallel perpendicular persons piece of card plane polygon practical Price Professor protractor prove PUBLISHERS pupil radius ratio READER rectangle regular respective rhomboid right angle scale schools Science sector segment sides sine solid square surface takes the name tangent touch trapezium versed sine volume write yards
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...