book Maths Puzzle Numerical Ability

What is the measure of each interior angle of a regular pentagon?

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book Other Question

23 - 5(3 - n) = -4(n - 2) + 9n The electrical resistance R of a wire varies directly as its length L
and inversely as the square of its diameter. A wire 20 meters long
and 0.6 centimeters in diameter made from