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A Transverse wave propagates at 90 degrees to the direction the amplitude increases In other words the wave oscillates up and down yet moves from left to right! this is different from a longitudinal wave, which oscillates in the same direction as it moves
A 90 degree angle is a right angle
A right-angle is a 90 degree angleA right triangle has one, and a 90-degree angle isone.
Fifty degrees. 90+40+90=180
Hint: 90/2=...