Babbitt, Arthur B. (Arthur Bradford), b. 1873 · New York, H. Holt and company · leaf 179
Fig. 68. An angle greater thana straight angle and lessthan two straight anglesis called a reflex angle.Fig. 69 represents a re-flex angle. Two angles are com-plementary when theirsum is equal to a rightangle. Each is calledthe complement of theother. In Fig. 70, theangles L 0 N and M ON are… … TRIANGLES A triangle is a plane surface bounded by threestraight lines. The bounding lines are called thesides of the triangle, the angles formed by the sides GEOMETRICAL DEFINITIONS 169
Mechanical drawing
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