What is a requirement of supplementary angles? Supplementary angles must be adjacent. Supplementary angles must be nonadjacent. The measures of supplementary angles must add up to 90°. The measures of supplementary angles must add up to 180°.

the measure of supplementary angles must add up to 180

Step-by-step explanation:

complementary angles add up to 90°

angles on a straight line are supplementary angles which add up to 180°

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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