A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 164
radius into its circumference, q. e. d. 329, Def.—A Sector is a part of a circle included between tworadii and their intercepted arc. Similar Sectors are sectors in differ-ent circles, which have equal angles at the centre. 330, Cor. 1.—The area of a sector is eqital to one-half the productof the… … EXERCISES. 1. What is the area in acres of a triangle whose base is To rodsand altitude 110 rods? 2. What is the area of a right angled triangle whose sides aboutthe right angle are 126 feet and 72 feet? 3. If 2 lines be drawn from the vertex of a triangle to the base,dividing the base into parts…
Geometry · Trigonometry
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