What is the sum of the angles

540

Step-by-step explanation:

Use the formula n - 2 x 180. N is the number of side which is 5 and minus that to 5 to get 3 and then multiply that to 180 to show how much the shape's interior is. You could use the formula for almost every shape or every shape with a corner.

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step-by-step explanation:

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answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11