A. Choose and write the letter of the correct answer. 1. What is the sum of the measures of the angles of a convex undecagon? a. 1 800° b. 1 980° c. 2 700° d. 1 620° 2. If the three angles of a quadrilaterals are 20°, 130° and 75°, what is the measure of the fourth angle? a. 120° S. 435° c. 150° d. 110° 3. How many sides does a polygon have if the sum of its interior angles is 1620°? a. 11 b. 9 c. 8 d. 7

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A: Find x

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A: In this question we use Pythagoras theorem to get the answer.

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A: We have to find the angle

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A: Use hint

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A: find the measure of angle x sum of angle of triangle is 180 x + 68 + 47 = 180 x + 115 = 180 x = 180…

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A: Question 4,Given,           x+33=2

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A: We will find the similarities.

Q: B

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A: We will use the property of similiarity of two triangles to solve this question.

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A: To solve the following problem