jay1041
23.06.2019 •
Mathematics
Classify the following triangle check all that apply
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Ответ:
Ответ:
35°
Step-by-step explanation:
<BCD + <C = 180° (angle on a straight line )
120° + <C = 180°
<C = 180° - 120° = 60°
<BAC + <ABC + <C = 180° (sum of interior angles of a triangle)
<BAC + 85° + 60° = 180°
<BAC + 145° = 180°
subtract 145° from bothsides
< BAC = 180° - 145° = 35°