I need help plz I do not really understand this if you can help me I’d highly appreciate

Mathematics

1 answer:

alisha [4.7K]3 years ago

8 0

Answer:

Step-by-step explanation:

question no 3

In complementary angles , sum of two angles is 90 degree. so here,

angle A + angle B = 90 degree

angle A is given i.e 11 degree . substitute the value of A

11 degree + angle B= 90 degree

angle B = (90 -11) degree

angle B = 79 degree

question no 4

In supplementary angles , sum of two angles is 180 degree so here,

angle A + angle B = 180 degree

angle A is given i.e 149 degree . substitute the value of angle A

149 degree + angle B = 180 degree

angle B = (180 - 149) degree

angle B = 31 degree

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