1) a triangle is a a) open figure b) closed figure 2) The sides in a triangle are a) 2 b) 3 c) 4 d) 5 3) the sum of interior angles of a triangle is a) 90 degree b) 180 degree c) 270 degree d) 360 degree 4) the number of angles in a triangle are a) 2 b) 3 c) 4 d) 5 5) the triangle with all sides of equal length is calles a) scalen triangle b) isosceles triangle c) equilateral triangle d) none of the above

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