Samacheer Kalvi Class 4 Maths Solutions Term 2 Chapter 1 Geometry Exercise 1.1

Tamilnadu Samacheer Kalvi 4th Maths Solutions Term 2 Chapter 1 Geometry Ex 1.1

Draw the mirror images:

Question 1.
Answer:The original shape has a wider rectangular part and a narrower triangular part. The mirror image flips this shape, so the triangular part of the reflection faces the triangular part of the original, creating a symmetrical design. The mirror acts as a line of symmetry between the object and its image.
In simple words: The picture shows a shape and its mirror image. The mirror image is what the shape would look like if you held it up to a mirror, exactly flipped.

🎯 Exam Tip: When drawing mirror images, imagine folding the paper along the mirror line; the reflected part should perfectly align with the original if it were a full shape.

Question 2.
Answer:The original shape is a "V" standing upright. When reflected across the vertical mirror line, it forms another "V" that joins the first one. This creates a "W" shape, showing perfect symmetry.
In simple words: The "V" shape is reflected to make a "W" shape. The mirror line is in the middle, splitting the "W".

🎯 Exam Tip: For simple lines and angles, ensure the distances from the mirror line are equal for both the original point and its reflection.

Question 3.
Answer:The initial shape is a semi-circle or a half-circle on the left side of the mirror line. When it is reflected across the vertical mirror, it completes itself to form a full circle. This illustrates how symmetrical shapes are built from halves.
In simple words: A half-circle is shown. When you add its mirror image, it makes a whole circle.

🎯 Exam Tip: Always observe if the mirror image completes a familiar geometric shape or creates a new symmetrical one.

Question 4.
Answer:The original shape is an "L" on its side, with the longer part vertical. When it's reflected across the vertical dotted line, its mirror image forms a symmetrical shape. This new shape resembles a cross or a plus sign with a base.
In simple words: The L-shaped figure is reflected. The reflection looks like another L, making a balanced shape around the mirror line.

🎯 Exam Tip: Pay attention to the orientation of corners and ends of lines; they must be mirrored correctly across the axis.

Question 5.
Answer:The starting figure is an incomplete rectangle, open on one side. When this open shape is reflected across the vertical mirror line, its mirror image fills the gap. This results in a complete, closed rectangle.
In simple words: The open square is reflected. This makes a full, closed square when both parts are together.

🎯 Exam Tip: Remember that a mirror image creates a symmetrical duplicate, which can often complete an incomplete figure into a standard geometric shape.