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26 questions · timed · auto-graded

Question 12 Marks
How many faces are there in a:
Pentagonal pyramid?
Answer
A pentagonal pyramid has $6$ faces, i.e. $1$ pentagon and $5$ triangles, namely $NOPQM, SNM, SOP, SNO, SMQ$ and $SQP.$
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Question 22 Marks
How many edges are there in a: Triangular prism.
Answer
A triangular prism has $9$ edges, namely $QR, RS, SQ, TU, UV, VT, RU, SV$ and $QT.$
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Question 32 Marks
How many vertices are there in a: Pentagonal prism.
Answer
A pentagonal prism has $10$ vertices, namely $A, B, C, D, E, F, G, H, I$ and $J.$
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Question 42 Marks
How many edges are there in a: Cuboid.
Answer
A cuboid has $12$ edges, namely $AD, DC, CB, BA, EA, FB, HD, DC, CG, GH, HE$, and $GF.$
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Question 52 Marks
Write down the number of edges of the following figures: Triangular prism.
Answer
A triangular prism has $9$ edges, namely $QR, RS, QS, TU, TV, UV, QT, RU,$ and $SV.$
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Question 62 Marks
Define Euler's relation between the number of faces, number of edges and number of vertices for various $3-$dimensional figures.
Answer
The Euler's relation for a three dimensional figure can be expressed in the following manner: $F - E + V = 2$
Here, $F -$ Number of faces. $E -$ Number of edges. $V - $Number of vertices.
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Question 72 Marks
Write down the number of faces of the following figures: Triangular prism.
Answer
A triangular prism has $5$ faces ($3$ rectangular faces and $2$ triangular faces), namely $QRUT, QTVS, RUVS, QRS$ and $TUV.$
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Question 82 Marks
Write down the number of vertices of the following figures: Triangular prism.
Answer
A triangular prism has $6$ vertices, namely $Q, R, S, T, U$ and $V.$
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Question 92 Marks
Write down the number of edges of the following figures: cube.
Answer
A cube has $12$ edges, namely $PL, LK, KO, OP, MN, NJ, JI, IM, PM, LI, ON$ and $KJ.$
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Question 102 Marks
How many vertices are there in a: Tetrahedron.
Answer
A tetrahedron has $4$ vertices, namely $K, L, M$ and $N.$
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Question 112 Marks
Write down the number of edges of the following figures: Rectangular pyramid.
Answer
A rectangular pyramid has $8$ edges, namely $AB, AE, AD, AC, EB, ED, DC$ and $CB.$
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Question 122 Marks
How many faces are there in a: Tetrahedron.
Answer
A tetrahedron has $4$ faces, namely $KLM, KLN, LMN$ and $KMN.$
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Question 132 Marks
How many faces are there in a: Pentagonal.
Answer
A pentagonal prism has $7$ faces, i.e. $2$ pentagons and $5$ rectangles, namely $ABCDE, FGHIJ, ABGF, AEJF, EDIJ, DCHI$ and $CBGH.$
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Question 142 Marks
Write down the number of faces of the following figures: Tetrahedron.
Answer
A tetrahedron has $4$ triangular faces, namely $KLM, KLN, LMN$ and $KMN.$
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Question 152 Marks
Write down the number of vertices of the following figures: Tetrahedron.
Answer
A tertrahedron has $4$ vertices, namely $K, L, M$ and $N$.
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Question 162 Marks
Write down the number of edges of the following figures: Tetrahedron.
Answer
A tetrahedron has $6$ edges, namely $KL, LM, LN, MN, KN$ and $KM.$
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Question 172 Marks
How many vertices are there in a: Square pyramid?
Answer
A square pyramid has $5$ vertices, namely $O, W, X, Y$ and $Z.$
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Question 182 Marks
Write down the number of faces of the following figures: Square pyramid.
Answer
A square pyramid has $5$ faces ($4$ triangular faces and $1$ square face), namely $OWZ, OWX, OXY, OYZ$ and $WXYZ.$
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Question 192 Marks
How many faces are there in a:
Cube.
Answer
A cube has $6$ faces, namely $IJKL, MNOP, PLIM, OKJN, POKL$ and $MNJI.$
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Question 202 Marks
Write down the number of faces of the following figures: Cuboid.
Answer
A cuboid has $6$ faces, namely $ABCD, EFGH, HDAE, GCBF, HDCG$ and $EABF.$
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Question 212 Marks
Write down the number of faces of the following figures: Cube.
Answer
A cube has $6$ faces, namely $IJKL, MNOP, PLIM, OKJN, LKOP$ and $IJNM.$
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Question 222 Marks
How many edges are there in a: Square pyramid?
Answer
A square pyramid has $8$ edges, namely $OW, OX, OY, OZ, WX, XY, YZ$ and $ZW.$
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Question 232 Marks
How many edges are there in a:
Tetrahedron.
Answer
A tetrahedron has $6$ edges, namely $KL, LM, MN, NL, KM$ and $KN.$
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Question 242 Marks
Write down the number of vertices of the following figures: Square pyramid.
Answer
A square pyramid has $5$ vertices, namely $O, W, X, Y$ and $Z.$
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Question 252 Marks
How many vertices are there in a: Cuboid.
Answer
A cuboid has $8$ vertices, namely $A, B, C, D, E, F, G$ and $H.$
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Question 262 Marks
Write down the number of vertices of the following figures: Cuboid.
Answer
A cuboid has $8$ vertices, namely $A, B, C, D, E, F, G$ and $H.$
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2 Marks Questions - MATHS STD 8 Questions - Vidyadip