exam Maths Puzzle Numerical Ability

Find the sum of the measures of the interior angles of a convex polygon with the given number of sides.

Number of sides-->4

Correct answer would really be appreciated:)

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exam Other Question

how do i do this problem......how do i find the partial fraction decomposition for the rational expression.

-2x^2+4x-7
__________

(x^2+4)^2
I am needing help one last time.

Identify the vertices and foci of the graph of the hyperbola

x^2/16 - y^2/16 = 1