1) If x° and (3x-2)° are complementary angles, find the value of x. a) 20° b) 23° c) 26° d) 29° 2) Find the sum of the interior angles of a polygon with eight sides. a) 1000° b) 1130° c) 1260° d) 1390° 3) The angles of triangle ABC are shown in the following diagram. Calculate the value of x. a) 35º b) 45º c) 55º d) 65º 4) A hexagon has interior angles 90°, 120°, 135°, 150°, x° and 165°, calculate the value of x. a) 40° b) 50° c) 60° d) 70° 5) Three angles of a quadrilateral are x°, 2x° and y°. Express the size of the fourth angles in terms of x and y, in its simplest form. a) 3yº + xº b) 3xº + yº c) 5yº + xº d) 3xº + 3yº 6) The interior angles of an irregular hexagon are 135°, 120°, 102°, 135°, 108° and a. Calculate the value of a. a) 100° b) 110° c) 120° d) 130° 7) The sum of interior angles of a polygon is 1440°. How many sides does it have? a) 7 sides b) 8 sides c) 9 sides d) 10 sides 8) An irregular pentagon has angles d, 88°, 100°, 121°, 152°. Find the value of d. a) 90° b) 91° c) 92° d) 93° 9) A quadrilateral has x°, 2x°, 3x° and 4x°. Find the value of x. a) 32° b) 36° c) 40° d) 44° 10) Calculate the exterior angle x. a) 94º b) 103º c) 79º d) 101º

Irregular polygons - Describe irregular polygons

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