Samacheer Kalvi Class 4 Maths Solutions Term 2 Chapter 1 Geometry InText Question

Activity (Text Book Page No. 2)

Question 1. Draw the mirror symmetry using the other half. (Dragonfly)
Answer: To complete the mirror symmetry, draw the exact reflection of the given dragonfly half on the opposite side. This creates a full, balanced image of the insect. The natural world often shows perfect symmetry.
In simple words: Copy the given half of the dragonfly to make the other side match perfectly, creating a whole dragonfly.

🎯 Exam Tip: When drawing mirror images, imagine a line through the middle and make sure every part is exactly the same distance from that line on both sides.

Question 2. Draw the mirror symmetry using the other half. (Turtle)
Answer: To achieve mirror symmetry, draw the other half of the turtle as a reflection of the given half. This will make the turtle appear whole and symmetrical, with identical left and right sides. Many animals have bilateral symmetry.
In simple words: Draw the missing half of the turtle so it looks the same on both sides, making a complete turtle.

🎯 Exam Tip: Pay attention to the curves and angles of the original half to ensure the reflected part is accurate.

Question 3. Draw the mirror symmetry using the other half. (Butterfly)
Answer: To complete the mirror symmetry for the butterfly, carefully draw the missing half so it is an exact reflection of the provided half. This process will result in a whole butterfly that is perfectly balanced and symmetrical from its center line. Butterflies are classic examples of symmetry in nature.
In simple words: Draw the other half of the butterfly to match the first half exactly, so it looks complete and balanced.

🎯 Exam Tip: Focus on making the wings on both sides look identical in shape and size for perfect symmetry.

Question 4. Draw the mirror symmetry using the other half. (Ladybug)
Answer: To show mirror symmetry, draw the other half of the ladybug as a precise reflection of the given half. This action will form a complete ladybug where both sides are identical along a central dividing line. Small details like spots should also be reflected accurately.
In simple words: Draw the missing half of the ladybug to make it symmetrical, so both sides look the same.

🎯 Exam Tip: Ensure that any patterns or spots on the ladybug are also reflected symmetrically on the drawn half.

Activity (Text Book Page No. 3)

Question 1. Find out the symmetry figure and colour it: (Heart)
Answer: The heart shape is symmetrical. When you draw a line down the middle, both halves are exact reflections of each other. Colouring it means filling in the entire shape to show its complete form.
In simple words: The heart shape is symmetrical. Colour the whole heart.

🎯 Exam Tip: Always look for a line that divides a figure into two identical mirror images to determine if it is symmetrical.

Question 2. Find out the symmetry figure and colour it: (Parallelogram)
Answer: A parallelogram is a symmetrical figure. It has point symmetry, meaning it looks the same if you rotate it 180 degrees around its center. It does not have line symmetry unless it is a special type like a rectangle or rhombus. Colouring the parallelogram completes the visual representation.
In simple words: The parallelogram is symmetrical by turning. Colour the whole shape.

🎯 Exam Tip: Remember that not all symmetrical figures have a line of symmetry; some have rotational symmetry.

Question 3. Find out the symmetry figure and colour it: (Cylinder)
Answer: A cylinder is a highly symmetrical figure. It has rotational symmetry around its central axis and infinite lines of symmetry if viewed from the side, passing through the center of the circles. It also has two planes of reflection symmetry. Colouring the cylinder helps visualize its three-dimensional form. This shape is common in everyday objects like cans.
In simple words: The cylinder is a very symmetrical shape. Colour the whole cylinder.

🎯 Exam Tip: For 3D shapes, think about both rotational and reflectional symmetry in different directions.

Question 4. Find out the symmetry figure and colour it: (Wavy Ribbon)
Answer: This wavy ribbon figure can be symmetrical if the waves on both sides of a central axis are identical. If it has a central line where one side is a mirror image of the other, then it shows line symmetry. Colouring the figure completes its representation. Many decorative items use symmetrical wavy patterns.
In simple words: The wavy ribbon can be symmetrical if both sides of its middle line are the same. Colour the whole ribbon shape.

🎯 Exam Tip: Visualizing the center line is key to checking for line symmetry in complex or curved figures.

Question 5. To observe from the surroundings and from day to day life situations and identify symmetrical objects.
Answer: When we look around us, many things are symmetrical. The pictures given show examples of symmetrical objects like a butterfly, a human figure, a temple, and various leaf or cross patterns. All these images can be divided into two identical halves by a line. Recognizing symmetry helps us appreciate design in nature and art.
In simple words: Many things around us, like butterflies, people, temples, and leaves, are symmetrical. This means they can be split into two matching halves.

🎯 Exam Tip: Think about objects in your home or outdoors and try to imagine if you can draw a line to cut them into two identical mirror images.