By multiplying and division
<span><span>The sum of the degree measures of two complementary angles is 90, so subtract 18 from 90.
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</span><span>The sum of the degree measures of two supplementary angles is 180...<span>
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Answer:
the new perimeter will be 1/3 time the perimeter of the original rectangle
Step-by-step explanation:
Answer:
sometimes, if their average angle is over 45 degrees
never are 2 obtuse angles summing to 180 degrees
always. two 90 degree angles always sum to 180 which is a straight line
Answer:
150 cause subtract 150 from 270 you get 150