5th Grade: Module 2 - Lesson 23
2 answers:
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Answer:
112 degrees.
Step-by-step explanation:
- as we know that the three set of forces will form a triangle, by using cosine rule, we can find the required angle.
- follow the diagram in the attachment.
- by cosine rule for
,
2*10*8*cos =
now, dividing both sides by 2*10*8,
cos = -61/160
= 112.4 degrees = 112 ( appox) ( use calculator for this cos inverse function)