Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 128
297. A right angle contains ninety angle degrees (§ 71);therefore, since equal central angles intercept equal arcs on thecircumference, a quadrant contains ninety arc degrees. Again, four right angles contain 360 angle degrees, and fourright angles at the center of a circle intercept a complete… … 118 PLANE GEO:\IETRY Ex. 409. Divide a given circumference into six equal arcs; threeequal arcs ; twelve equal arcs. Ex. 410. A diameter and a secant perpendicular to it divide a cir-cumference into two pairs of equal arcs. Ex. 411. Construct a circle which shall pass through two given pointsA and…
Geometry, Plane · Geometry, Solid
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