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AveGali [126]
4 years ago
14

Angles that are congruent and supplementary must be

Mathematics
2 answers:
Lilit [14]4 years ago
8 0
I think straight angles ?
ExtremeBDS [4]4 years ago
3 0

Answer: d. right angles.

Step-by-step explanation:

  • If the sum of two angles is 180^{\circ}, then they are called as supplementary angles.
  • If two angles are equal then they are said to be congruent.

Let a and b be two angles which are congruent and supplementary

Then a=b [congruent]

And a+b=180^{\circ}

2a=180^{\circ}\\\Rightarrow a=90^{\circ}

Hence, the angles  that are congruent and supplementary must be right angles.

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