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MATHS 2 Marks Questions

Symmetry and Practical Geometry · Rajasthan Board (RBSE) STD 6 (Rajasthan - English Medium). 4 questions.

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2 Marks Questions

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4 questions · self-marked practice — reveal the answer and mark yourself.

Question 12 Marks
In Figure, $PQRS$ is a rectangle. State the lines of symmetry of the rectangle.
Answer
As we know that, a rectangle has two lines of symmetry along the line segments joining the mid-points of the opposite sides. So, in the given rectangle, lines $AC$ and $BD$ are the lines of symmetry.
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Question 22 Marks
Draw the images of points $A$ and $B$ in line l of Figure and name them as $A'$ and $B'$ respectively. Measure $AB$ and $A' B'.$ Are they equal$?$
Answer
Image of line segment $AB$ is $A' B’$ as shown below in figure.

Now, it is clear that the length of line segment $AB$ is equal to length of a line segment $A' B’.$
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Question 32 Marks
Is there any line of symmetry in the Figure? If yes, draw all the lines of symmetry.
Answer
Yes, there is one line of symmetry.
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Question 42 Marks
Draw the images $P', Q'$ and $R'$ of the points $P, Q$ and $R,$ respectively in the line $n$ figure. Join $P' Q'$ and $Q' R'$ to form an angle $P' Q' R'.$ Measure $\angle\text{PQR}$ and $\angle\text{P}'\text{Q}'\text{R}'.$ Are the two angles equal?
Answer
The images of the points $P, Q$ and $R$ in the line n are $P’, Q’$ and $R’$ respectively.

It is clear that, $\angle\text{PQR}=\angle\text{P}’\text{Q}’\text{R}’.$
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