Triangle 75
Triangle ABC has angle C bisected and intersected AB at D. Angle A measures 20 degrees, and angle B measures 40 degrees. The question is to determine AB-AC if length AD=1.
Correct answer:
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You need to know the following knowledge to solve this word math problem:
- planimetrics
- triangle
- The Law of Cosines
- The Law of Sines
- numbers
- fractions
- goniometry and trigonometry
- sine
Units of physical quantities:
Grade of the word problem:
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