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CHAPTER 1: POLYGONS 4. How many diagonals does a triangle have A 0 B 1 DA Which of the following shapes is a nanded polygon? A pentagon B. hexagon 6. How many vertices does a decagon have? thepragon Doctagon AHEAD In this chapter, you will learn about a special group of shapes defined by straight lines and angles . These shapes are all around you, from the things you see in the classroom, to the creations in nature. Here, you will draw these shapes and learn about their special properties. A 7 B 8 D 10 7 Which polygon has no interior angle greater than 180° A comave 11 convex (equiangular Dimegular 8. Which is the sum of the measures of the interior angles of a bonagon A 1,260 D 1.440 C1620 D. 1960 KNOWLEDGE CHECK 9. Which is the sum of the measures of the exterior angles of a 19-audal polygon A 90° B. 180 C 360° D 540 Direction: On a separate sheet of paper, write the letter of the correct answer 1. Which of these figures is a concave polygon? B A D 2. Which of the following descriptions states a fact about the exterior angles of a regular polygon" A acute B. congruent C complementary D. supplementary 3. Which of the following quadrilaterals is NOT the same as the others? A ABCD B. DCBA CCBAD D CBDA 10. What do you call the 2 coplanar angles that have a common side and a common vertex, but no common interior point A adjacent B congrent C supplementary D. complementary 11. Which of the following angle pairs is always supplementary A adjacent B. vertical (linear pate D. congruent 12 What do you call coplanar lines that do not intersect A parallel 11. intersecting perpendicular D. congruent 13. Which of the following statements about an isosceles triangle is always true A. It has two congruent sides 1. It is also an acute triangle ( It is also a right triangle D It has one diagonal 14. Which of the following descriptions about a quadrilateral is NOT true A. It has 4 sides B It has 4 angles. Chas 4 vertices D. It has 4 diagonals 15. Which is the measure of each interior angle of a regular decagon? A 80 B. 144 C180 D 360°
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