# algrbra/trigonometry

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in triangle ABC, angle a=120, b=10, and c=18. What is the area of triangle ABC tot he nearest square inch?

• algrbra/trigonometry -

perfect setup for using
area = (1/2)(b)(c)sin A, where A is the contained angle.
area = (1/2)(10)(18)sin 120°
= 77.94 or 45√3 as an exact value.

• algrbra/trigonometry -

this is wrong.

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