1. Supplementary angle of 60

Solution:


Supplementary of `60 ^circ` is the angle that when added to `60 ^circ` forms a straight angle (`180 ^circ`).

`=180 ^circ-60 ^circ`

`=120 ^circ`

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2. Supplementary angle of 120

Solution:


Supplementary of `120 ^circ` is the angle that when added to `120 ^circ` forms a straight angle (`180 ^circ`).

`=180 ^circ-120 ^circ`

`=60 ^circ`

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3. Supplementary angle of 45

Solution:


Supplementary of `45 ^circ` is the angle that when added to `45 ^circ` forms a straight angle (`180 ^circ`).

`=180 ^circ-45 ^circ`

`=135 ^circ`

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4. is Supplementary angles 60, 120

Solution:


`=60 ^circ + 120 ^circ`

`=180 ^circ`

Here sum is `180^circ`

So, `60 ^circ, 120 ^circ` are supplementary angles

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5. is Supplementary angles 30, 60

Solution:


`=30 ^circ + 60 ^circ`

`=90 ^circ`

Here sum is not `180^circ`

So, `30 ^circ, 60 ^circ` are not supplementary angles