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### Geometry2.28 Triangles Review Test

 Q 1: The angles 90 degrees, 30 degrees and 60 degrees represents an obtuse angled triangle.FalseTrue Q 2: The perimeter of a triangle with sides a = 3 cm, b= 9 cm and c = 10 cm is 22 cm.TrueFalse Q 3: The sum of the interior angles of a polygon of 13 sides is ____ degrees.Answer: Q 4: The ______ of a triangle is the point of concurrence of the perpendicular bisectors of the sides of the triangle.circumcirclecircumcentrecircumradius Q 5: A research team wishes to determine the altitude of a mountain as follows: They use a light source at L, mounted on a structure of height 2 meters, to shine a beam of light through the top of a pole P' through the top of the mountain M'. The height of the pole is 20 meters. The distance between the altitude of the mountain and the pole is 1000 meters. The distance between the pole and the laser is 10 meters. We assume that the light source mount, the pole and the altitude of the mountain are in the same plane. Find the altitude h of the mountain. 1820 metres1000 metres500 metres Q 6: In a triangle, the sides are given as 6cm, 6cm and 4cm. Which of the following best describes this triangle.Scalene triangleEquilateral TriangleIsosceles Triangle Q 7: If two sides and the included angle of a triangle are respectively equal to two sides and the included angle of another triangle, then the two triangles are congruent.RHS PropertySSS PropertyASA PropertySAS Property Q 8: Given two triangles ABC and DEF. AB = 3 cms, angle A = 40, angle D = 40, AC = 5 cms, DE= 4.5 cm, find angle B DF = 7.5 cm45o60o30o Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!