 | John Gummere - 1814 - 398 páginas
...degrees, 18 minutes and 35 seconds. 4. The complement of an arc, or of an angle, is what it wants of 90°; and the supplement of an arc, or of an angle, is what it wants of 180°. 1 5. The chord of an arc, is a line drawn from one extremity of the are to the other : thus... | |
 | James Elliot - 1851 - 162 páginas
...circles, angles at the centre are said to be measured by the arcs on which they stand. 7. The Complement of an arc or of an angle is what it wants of 90°. The Supplement is what it wants of 180°. Thus the arc BG- is the complement, and BA the supplement,... | |
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Hence, the arc MB is the complement of the arc MA, and the angle MCB is the complement of the angle MCA... 