The lines are perpendicular because their slopes are opposite reciprocals of each other (4 and -1/4).
Answer from: Quest
60
step-by-step explanation:
every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.
Answer from: Quest
the answer is 8/21
hope this
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