Lakshya Education MCQs

Question:

Line AB is a line of symmetry. True or False.
Options:
A.True
B.False
Answer: Option B
: B

Diagonal of a rectangle divides the rectangle into two triangles that are congruent, but folding along the line ABdoes not make the two triangles coincide with each other. Hence AB is not a line of symmetry.

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More Questions on This Topic :

Question 1. How many lines of symmetry are there in an equilateral triangle?


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: Line of symmetry is a line which divides a figureinto two equal mirror images. In an equilateral triangle,there are 3 such lines.
Question 2. In a regular hexagon each internal angle measures 108. (True or False)
  1.    True
  2.    False
Answer: Option B
: B

Internal angle of regular polygon = (n2)×180n
where, n is the number of sides. Substituting, n = 6 in the above formula,we get internal angle as 120for a regular hexagon.
Question 3. Which of the following figures has/have more than one line of symmetry?

(i)   Square

(ii)  Rectangle

(iii) Regular pentagon

(iv) Isosceles triangle
  1.    Only (i)
  2.    Only (i) and (ii)
  3.    Only (i), (ii) and (iii)
  4.    (i), (ii) and (iv)
Answer: Option C
: C

A square has 4 lines of symmetry.
A rectangle has2 lines of symmetry.
A regular pentagon has5 lines of symmetry.


An isosceles triangle has only oneline of symmetry.

Thus, the figures with more than oneline of symmetry are: square, rectangle and regular pentagon.
Question 4. How many lines of symmetry are there in an equilateral triangle?


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: Line of symmetry is a line which divides a figureinto two equal mirror images. In an equilateral triangle,there are 3 such lines.
Question 5. Consider a regular pentagon. Mark the centre of pentagon as O. Centre of pentagon is defined as a point which is equidistant from all the vertices. Hence, if a vertical line is drawn through O, perpendicular to the plane in which pentagon is drawn, then the vertical line is called as line of symmetry. State true or false.
  1.    True
  2.    False
Answer: Option B
: B

If a vertical line is drawn through O, perpendicular to the plane in which pentagon is drawn,then the vertical line is called axisof symmetry. Hence, the given statement is false.
Question 6. In a regular hexagon each internal angle measures 108. (True or False)
  1.    True
  2.    False
Answer: Option B
: B

Internal angle of regular polygon = (n2)×180n
where, n is the number of sides. Substituting, n = 6 in the above formula,we get internal angle as 120for a regular hexagon.

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