How many are pairs of angles as supplementary angles in given figure .

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Solution

Supplementary angles are those pair of angles whose sum of angles is $180$ degree.

$(1) . ∠ 1 + ∠ 2 = 135 ° + 45 ° = 180 °$

$(2) . ∠ 1 + ∠ 2 = 90 ° + 90 ° = 180 °$

$(3) . ∠ 1 + ∠ 2 = 140 ° + 55 ° = 195 °$

Hence $2$ pairs of angles are supplementary angle.

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How many are pairs of angles as supplementary angles in given figure .

Supplementary angles are those pair of angles whose sum of angles is 180 degree.(1).∠1+∠2=135°+45°=180°(2).∠1+∠2=90°+90°=180°(3).∠1+∠2=140°+55°=195°Hence 2 pairs of angles are supplementary angle.

Supplementary angles are those pair of angles whose sum of angles is $180$ degree.

$(1) . ∠ 1 + ∠ 2 = 135 ° + 45 ° = 180 °$

$(2) . ∠ 1 + ∠ 2 = 90 ° + 90 ° = 180 °$

$(3) . ∠ 1 + ∠ 2 = 140 ° + 55 ° = 195 °$

Hence $2$ pairs of angles are supplementary angle.