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Can someone give me natural existing solutions? Like not manmade solutions? Given: The coordinates of rectangle DEFG are D(0, b), E(a, b), F(a, 0), and G(0, 0). Prove: The diagonals of a rectangle are congruent.As...? The emission of mercury shows a line of wavelength 579 nm. how much energy is emitted as the excited electron falls to a lower level? What is the sum of infinite geometric series where the first term is 2 and the second is 1 ?a.4 b.2 c.3 d.7 e.8? How would i find the phase shift of y=4sin(0/3-4pi/3)-1?