46. If an isosceles triangle has more than one line of symmetry, then it must be
- (A) An equilateral triangle
- (B) A scalene triangle
- (C) A right-angled triangle
- (D) None of these
45. The maximum number of lines of symmetry in an isosceles trapezium is
- (A) 0
- (B) 1
- (C) 2
- (D) None of these
44. A rhombus is symmetrical about its
- (A) Sides
- (B) Diagonals
- (C) Vertices
- (D) Point of intersection of diagonals
43. If a rectangle has more than two lines of symmetry, then it must
- (A) Quadrilateral
- (B) Rhombus
- (C) Square
- (D) Kite
42. The number of lines of symmetry in a regular polygon of n sides is
- (A) n – 1
- (B) n + 1
- (C) n/2
- (D) n
41. The number of lines of symmetry in a 45° – 45° – 90° set-square is
- (A) 0
- (B) 1
- (C) 2
- (D) 3
40. The number of lines of symmetry in a 30° – 60° – 90° set square is
- (A) 0
- (B) 1
- (C) 2
- (D) 3
39. If B is the image of A in line l and D is the image of C in line l, then AC is equal to
- (A) DA
- (B) BD
- (C) CD
- (D) CB
38. Line of symmetry for an angle is its
- (A) Bisector
- (B) Arms
- (C) Vertex
- (D) Point of rotation
37. If an angle of measure 80° is reflected in a line of symmetry, then the reflection is an angle of measure
- (A) 40°
- (B) 180°
- (C) 90°
- (D) 80°
36. Let a be the distance of the image of a point (or an object) from the line of symmetry (mirror) and b is that of the point (object) from the line (mirror). Then which of the following is true?
- (A) a < b
- (B) a > b
- (C) a = b
- (D) None of these
35. If p be the number of lines of symmetry in a rectangle and q is that of a rhombus, then which of the following is true?
- (A) p < q
- (B) p > q
- (C) p = q
- (D) None of these
34. If a line segment of length 5 cm is reflected in a line of symmetry (mirror), then its reflection (image) is also a line of length
- (A) > 5 cm
- (B) < 5 cm
- (C) = 5 cm
- (D) = 10 cm
33. How many letters of the word ALGEBRA are there, which have no line of symmetry?
- (A) 5
- (B) 4
- (C) 9
- (D) None of these
32. In the following figures, the figure that is not symmetric with respect to any line is:
- (A) (i)
- (B) (ii)
- (C) (iii)
- (D) (iv)
31. The number of lines of symmetry in the following figure is
- (A) 5
- (B) 4
- (C) 3
- (D) None of these