Samacheer Kalvi Class 4 Maths Solutions Term 1 Chapter 1 Geometry Exercise 1.7

Tamilnadu Samacheer Kalvi 4th Maths Solutions Term 1 Chapter 1 Geometry Ex 1.7

A. Choose the Correct Answer:

Question (i) A cuboid has ______ edges.
(a) 6
(b) 8
(c) 12
Answer: (c) 12
In simple words: A cuboid is a 3D shape like a brick or a box. It has 12 edges, which are the straight lines where its flat faces meet.

🎯 Exam Tip: Remember a cuboid has 6 faces, 12 edges, and 8 vertices. Visualizing a real-world object like a matchbox can help.

Question (ii) The shape of a dice is like a ______.
(a) cuboid
(b) cube
(c) sphere
Answer: (b) cube
In simple words: A dice has six flat sides that are all square and equal in size. This specific 3D shape is called a cube.

🎯 Exam Tip: Know the difference between a cuboid (rectangular faces) and a cube (square faces) for similar questions.

Question (iii) A ______ has a curved surface and two plane faces.
(a) cylinder
(b) cone
(c) sphere
Answer: (a) cylinder
In simple words: A cylinder looks like a can. It has a rounded, curved side and two flat, circular ends.

🎯 Exam Tip: Remember common shapes: a cylinder has two flat circles and one curved side, a cone has one flat circle and one curved side ending in a point, and a sphere is fully curved like a ball.

Question (iv) I have one vertex and one plane face. I am a ______.
(a) cone
(b) cylinder
(c) sphere
Answer: (a) cone
In simple words: A cone has a pointy top, which is its vertex, and a single flat, circular base, which is its plane face. Think of an ice cream cone.

🎯 Exam Tip: Understand the key features: a vertex is a corner point, an edge is where two faces meet, and a face is a flat surface. A cone uniquely combines one vertex with one flat face.

Question (v) A cube has ______ vertices.
(a) 8
(b) 12
(c) 6
Answer: (a) 8
In simple words: A cube has corners where its edges meet. If you count all the corners of a cube, you will find eight of them.

🎯 Exam Tip: To easily remember the number of faces, edges, and vertices for cubes and cuboids, count them on a physical object like a box or a dice.