RBSE Solutions Class 8 Maths Chapter 8 Visualization of Solids Exercise 8.2

Rajasthan Board RBSE Class 8 Maths Chapter 8 Visualization of Solids Ex 8.2

Question 1. Expanding the solid shape of cube and cuboid draw the different two net pattern of figure other than book.
Answer: When we open up a solid shape like a cube or a cuboid, we get a flat pattern called a net. Here are two different net patterns for a cube and two for a cuboid, which can be folded to form the original solid. These patterns help us understand how 3D shapes are made from 2D faces.

🎯 Exam Tip: Practice drawing various nets for common solids. Remember that a solid can have multiple different nets that will all fold correctly.

Question 2. After cut the hollow right circular cylinder according to the dotted line, show the obtained 2d-shape.
Answer: When a hollow right circular cylinder is cut along its height (the dotted line) and unrolled, its curved surface opens up into a rectangle. The top and bottom parts remain as two circular bases. So, the 2D shape obtained is a rectangle and two circles. The rectangle's length will be the cylinder's circumference, and its width will be the cylinder's height.

🎯 Exam Tip: Visualize the transformation carefully. A cylinder's curved surface becomes a rectangle, and its bases remain circles.

Question 3. By folding the expanded figure (joining the faces), draw the solid figure.
Answer: When you fold these flat patterns (nets) along their edges, they form specific three-dimensional solid figures. It's like building a model from a paper cutout.

🎯 Exam Tip: To figure out what solid a net forms, count the number and shapes of its faces. Then, mentally fold it, or try drawing dotted lines for hidden edges to visualize the 3D shape.