5. What is the first step in a proof by mathematical induction to show that "For all the positive intégers n, 12 + 22 + ... + n2 = n(n+1)(2+1) " is true? Assume the formula is true for n = k.
Show that the formula is true when n = 1.
Substitute k into the original formula,
Prove that the formula is true for the (k + 1) term.

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

How do i find the missing angle measure in a polygon

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