Question

please please please answer the question and step by step for class 7​

Answer 1

Answer:

Complementory angles are those whose sum is 90°.

so In question 1st, option 1st and 4th are complementry.

Answer 2

Answer of Q-1 is part 1 and 4

As complementary angles are those whise sum is 90 degrees so ;

1)70+20=90 yes

2)75+25=100no

3)48+52=100no

4)55+35=90 yes

Ans-Q-2

To find out the complement of the angle we hav e to subtract the given angle with 90 like

1)90-45=45

2)90-65=25

3)90-41=48

4)90-54=36

Ans Q-3

Let one angle be x

And second angle =x-90

=x-x-90=12

2x-90=12

2x=12+90

2x=102

X=51

90-x=90-51=39