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complaint
complaisant
compleat
complected
complement
complement fixation
complementarity
complementary
complementary angle
complementary color
complementary DNA
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complementary angle

com·ple·men·ta·ry an·gle (plural com·ple·men·ta·ry an·gles)


noun 
Definition:
 
part of right angle: either of two angles that together make up a right angle

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