I really need your help. Please check this!

I think it is camera 1.
Three security cameras were mounted at the corners of a triangular parking lot. Camera 1 was 151 ft from camera 2, which was 122 ft from camera 3. Cameras 1 and 3 were 139 ft apart. Which camera had to cover the greatest angle?

Options:
Camera 1
Camera 2
Camera 3
Cannot Tell

Question

I really need your help. Please check this!

I think it is camera 1.
Three security cameras were mounted at the corners of a triangular parking lot. Camera 1 was 151 ft from camera 2, which was 122 ft from camera 3. Cameras 1 and 3 were 139 ft apart. Which camera had to cover the greatest angle?

Options:
Camera 1
Camera 2
Camera 3
Cannot Tell

anonymous · Answer

I was picturing it as a right triangle, but my big brother says it is appears to be an obtuse triangle. What do you think?

anonymous · Answer

The correct answer is camera 3. Can anybody explain to me why that is?