CBSE Class 8 Mathematics Exploring Some Geometric Themes MCQs Set 05

Question. Octahedron has how many different nets?
(a) 11
(b) 2
(c) 6
(d) 8

Answer: A

Question. Sierpinski Carpet, Gasket and Koch Snowflake are examples of.
(a) Prisms
(b) Mathematical fractals
(c) Nets
(d) Projections

Answer: B

Question. Projection of an object on a vertical plane in front is called.
(a) Top view
(b) Front view
(c) Side view
(d) Bottom view

Answer: B

Question. The isometric projection of a cube looks like a regular.
(a) Pentagon
(b) Hexagon
(c) Triangle
(d) Circle

Answer: B

Question. Why information is lost in projection?
(a) Because it is 2D
(b) Because it is 3D
(c) Because it is small
(d) Because it is dark

Answer: A

Question. If a cube is made of glass, in isometric drawing all edges will be.
(a) Hidden
(b) Visible
(c) Broken
(d) Thick

Answer: B

Question. Outline of an object profile depends on our.
(a) Weight
(b) Viewpoint
(c) Name
(d) Color

Answer: B

Question. In a cube, the number of edges is given as.
(a) 6
(b) 8
(c) 12
(d) 10

Answer: C

Question. Slitting a cylinder along its height and unrolling it gives a.
(a) Circle
(b) Rectangle
(c) Triangle
(d) Square

Answer: B

Question. If l is actual length and p is projected length, then p is.
(a) Always more than l
(b) Less than or equal to l
(c) Always zero
(d) Twice l

Answer: B

Question. Isometric projection of a cube looks like a regular.
(a) Pentagon
(b) Hexagon
(c) Triangle
(d) Square

Answer: B

Question. Boundary of a cone net after unrolling is a portion of a.
(a) Square
(b) Circle
(c) Line
(d) Star

Answer: B

Question. A solid with two congruent polygons as opposite faces is called a.
(a) Pyramid
(b) Prism
(c) Sphere
(d) Cone

Answer: B

Question. Number of holes at Step 0 is.
(a) 1
(b) 0
(c) 8
(d) 9

Answer: B

Question. To make a sturdy solid from a net, we use flaps or.
(a) Water
(b) Cello tape
(c) Pen
(d) Sand

Answer: B

Question. Any object can be represented on a flat surface using its.
(a) Weight
(b) Projections
(c) Name
(d) Volume

Answer: B

Question. If we tile a plane with hexagons, we get an.
(a) Escher art
(b) Isometric grid
(c) Sierpinski carpet
(d) Net

Answer: B

Question. Projection on the side plane is called.
(a) Front view
(b) Side view
(c) Top view
(d) Net

Answer: B

Question. If a straight line drawn on a net goes outside the net area, that path.
(a) Is shortest
(b) Is real
(c) Is not possible on solid
(d) Is very long

Answer: C

Question. Solid whose faces are all pentagons is called.
(a) Octahedron
(b) Dodecahedron
(c) Tetrahedron
(d) Cube

Answer: B