The reason for each of the statements are given below;
[tex]\angle1\text{ and }\angle2\text{ form a linear pair}[/tex]
40. Given
[tex]\angle1\text{ and }\angle2\text{ are supplementary}[/tex]
41. Linear pair of angles are supplementary.
[tex]m\angle1+m\angle2=180^0[/tex]
42. Supplementary angles.
Supplementary angles add up to 180 degrees.
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