What is the square root of pi?

Draw the line of reflection that reflects △abc onto triangle δ a'b'c'

When are two distinct non vertical lines parallel

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.