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Post a LessonAnswered on 24 Feb Learn CBSE/Class 8/Maths/Visualizing Solid Shapes
Sadika
Answered on 24 Feb Learn CBSE/Class 8/Maths/Visualizing Solid Shapes
Sadika
A cone is a three-dimensional geometric shape with a circular base and a curved surface tapering to a point called the apex or vertex.
A cone has two parts that can be considered as vertices:
So, a cone has two vertices: the apex and the center of the circular base.
Answered on 24 Feb Learn CBSE/Class 8/Maths/Visualizing Solid Shapes
Sadika
A polyhedron is a three-dimensional geometric figure with flat faces, straight edges, and vertices.
Out of the options provided, a cone is not a polyhedron.
However, a cone does not have flat faces; it has a curved surface. Therefore, a cone is not considered a polyhedron.
Answered on 24 Feb Learn CBSE/Class 8/Maths/Visualizing Solid Shapes
Sadika
A triangular prism is a type of polyhedron with two triangular faces and three rectangular faces. Let's count the faces, edges, and vertices:
So, the total number of faces is 2 (triangular) + 3 (rectangular) = 5 faces.
So, the total number of edges is 2 (triangular faces * 3 edges per face) + 3 (rectangular faces * 4 edges per face) = 6 + 12 = 18 edges.
So, the total number of vertices is 2 (triangular faces * 3 vertices per face) + 3 (rectangular faces * 4 vertices per face) = 6 + 12 = 18 vertices.
Therefore, a triangular prism has:
Answered on 24 Feb Learn CBSE/Class 8/Maths/Visualizing Solid Shapes
Sadika
A triangular pyramid, also known as a tetrahedron, is a type of pyramid that has a triangular base and three triangular faces that meet at a single vertex.
A pyramid with a square base is called a square pyramid. It has a square base and four triangular faces that meet at a single vertex, which is directly above the center of the square base.
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