Answer :

Answer:

89

Step-by-step explanation:

80+11=91 and 180-91=89

abigailm6387
Answer:89

Explanation: A triangles angles add up to 180 degrees therefore you would need to add the 2 angles that you already know in this case 91 and subtract it from 180 to find the missing side 89 would be the answer.

Hope this helped :)

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