Step-by-step explanation:
Since every triangle adds up to 180 degrees the unknown side would be 53!++
Hi mate....
This is your answer....
Triangle Fixed Value = 180°
AC = 180 - (30 + 87)
= 180 - 117
= 63°
Checking your answer....
= 117 + 63
= 180°
Hope it helps you....
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