Properties of TrianglesOnline version Select the correct option for each question by Juan Carlos Rojas 1 How many diagonals does a regular six-sided polygon (hexagon) have? a 5 b 3 c 8 d 9 2 Which of the following statements is correct: a A right triangle has one obtuse angle and two acute ones. b The equilateral triangle is one that has all its angles and sides equal. c The sum of the interior angles of a triangle is greater than 180 degrees. d The scalene triangle has all its sides equal. 3 Taking into account the property of sum of interior angles of a triangle and the information of the graph. It can be said that the value of the angle (α) is: a 180º b 90º c 45º d 128º 4 Taking into account the property of sum of exterior angles of a triangle and the information from the graph. It can be said that the value of the angle (β) is: a 180º b 360º c 152º d 120º 5 Taking into account that an angle of a rhomboid measures 36° then what is the measure of each of the other three angles? a 36°, 134°, 134° b 36°, 144°, 144° c 36°, 154°, 154° d 36°, 164°, 164° 6 The arrangement of an acute angle of an isosceles trapezoid has a measure of 50°. How long are each of the other three angles? a 50°, 115°, 115° b 50°, 120°, 120° c 50°, 130°, 130° d 50°, 140°, 140° 7 Two adjacent angles are what... a add up to 180 ° b they add up to 45 °, have a common vertex, a common side and the other sides are an extension of the other. c add up to 180 °, have a common vertex, a common side and the other sides are an extension of the other. d All of the above 8 Which of the following polygons are regular? a polygons B, D and E are regular b Polygons B, C, and D are regular c all polygons are regular d None of the polygons is regular 9 If the triangle is equilateral, the value of x is: a 40° b 30º c 40º d 60º 10 2. What is the correct measure of the sum of the interior angles of a triangle? a 60°, 40° y 70° b 60°, 40° y 170° c 60°, 40° y 90° d 60°, 40° y 80°
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