Page 144 - Math Genius C5
P. 144
E:\Working\Orange_Education\Math_Genius_5\Open_Files\CHAP_07
\\October 8, 2025 12:37 PM Bharat Arora P-9 Reader _________________________ Date: ___________________74
one Line of Symmetry
Some figures have one line of symmetry. Look at the following figures.
A
Isosceles triangle Semicircle Arrow Alphabet
more than one Line of Symmetry
Some figures have more than one line of symmetry. Observe the following figures which
have more than one line of symmetry.
A circle has an infinite number of lines of symmetry.
Think Tank Logical Thinking
Imagine a square. It has 4 lines of symmetry. If you cut the square in half along its
diagonal, you get a triangle. How many lines of symmetry does this new triangle have?
mirror image
When we see an object in the mirror, we see its reflection.
A reflection of an object means to produce its mirror image. Right Left
The mirror line is the line of symmetry between the object and
its mirror image (reflection). The mirror image of a figure or an
object is the same but it appears reversed.
The mirror image or reflection of a figure can be made using squared paper.
If you put a mirror on the line of symmetry, you can get the other half of a
symmetrical figure (see adjoining figure).
activity FACTS
Experiential Learning
Collect leaves or flowers and fold them Symmetry helps butterflies fly
along their line of symmetry. Compare the halves. straight, allows flowers to attract
pollinators, and is found in snowflakes,
Draw or trace the object and its line of symmetry. leaves, and even the human body.
Mathematics-5
142 Mathematics-5
142
