7th Grade > Mathematics
VISUALISING SOLID SHAPES MCQs
Total Questions : 129
| Page 5 of 13 pages
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Definition: 1 Mark each
a.Avertex(plural:vertices) is a point where two or more straight lines meet. E.g. The 8 corners of the cube are its vertices.
b.An edge is a line segment that joins two vertices. E.g.The 12 line segments that form the skeleton of the cube are its edges.
c.A face is any of the individual surfaces of a solid object. E.g. The 6 flat square surfacesof the cube are its faces.
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Formula: 1.5 Marks
Application: 0.5Mark each
Euler’s Formula:
Faces + Vertices – Edges = 2
1) 3 + 4 - 6 = 1
1 ≠ 2
2) 3 + 8 -12 = -1
1 ≠ 2
3) 4 + 6 - 12 = -2
-2 ≠ 2
4) 3 + 20 - 30 = -7
-7 ≠ 2
5) 5 + 12 - 30 = -13
-13 ≠ 2
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This shape has a triangular base, and the sides are made from 3 triangles which meet at the top. The resultant shape is a pyramid.
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Answer: 1 Mark
Key feature: 1 Mark
A cuboid has 6 faces which are all rectangles.
Cuboid is a rectangular prism.
The key feature of a prism is that it has arectangular cross-section along its length. The cuboid also has a rectangular cross-section, which makes it a prism.
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Examples: 0.5 Marks each
Few examples ofprisms are:
a) Triangular prism
b) Hexagonal prism
c) Cuboid
d) Cube
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Examples: 0.5 Marks each
Few examples ofprisms are:
a) Triangular prism
b) Hexagonal prism
c) Cuboid
d) Cube
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Answer: 1 Mark
Key feature: 1 Mark
A cuboid has 6 faces which are all rectangles.
Cuboid is a rectangular prism.
The key feature of a prism is that it has arectangular cross-section along its length. The cuboid also has a rectangular cross-section, which makes it a prism.
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