A carpenter makes a triangular frame by joining three pieces of wood that are 20 cm, 24 cm, and 30 cm long. What is the measure to the nearest degree of the smallest angle in the frame? (Enter only the number.)

Answer 1

law of sines: smallest angle opposite smallest side.

That would be between the sides of 24 and 30. The law of cosines tells us that

20^2 = 24^2 + 30^2 - 2(24)(30) cosθ

Now just do the math

Answer 2

What the answer so I can check