1) The sum of all the angles of a triangle is a) 90 degree b) 108 degree c) 180 degree d) 360 degree 2) Triangles on the same base and between the same parallel lines are a) Equal in area b) Unequal in area c) May be a and b d) None of these 3) If a line joining any vertex of the triangle to the mid-point of its opposite sides then the line is called a) Altitude b) Angle bisector c) Median d) None of these 4) Angles opposite to equal sides of an isosceles triangle are a) Equal b) Different c) May be equal or different d) None of these 5) The point of concurrence of all' the three medians of a triangle is called a) Orthocentre b) Incentre c) Centroid d) Circumcentre 6) The point of concurrence of all the three altitudes of a triangle is called a) Circumcentre b) Incentre c) Orthocentre d) Centroid 7) The point of concurrence of all'the three angle bisectors of a triangle is called a) Centroid b) Orthocentre c) Incentre d) Circumcentre 8) The point of concurrence of all'the three perpendicular bisector of the sides of a triangle is called a) Centroid b) Orthocentre c) Incentre d) Circumcentre 9) How many triangles are there in the given figure? a) 16 b) 20 c) 9 d) 13 10) How many triangles are there in the given figure? a) 23 b) 31 c) 32 d) 22

Triangle

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