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2D and 3D Figures

Q: Dice are cubes with dots on each face. Opposite faces of a die always have a total of seven dots on them.Here are two nets to make dice(cubes); the numbers inserted in each square indicate the number of dots in that box.Insert suitable numbers in the blanks, remembering that the number on the opposite faces should total to \$7\$.

First Net :Since, the number left to 4 will be opposite to 5, it should be 2.The number left to 2, will be opposite to 4, it will be 3. 1 will be put in left over face, which will come to opposite of 6.Second Net :When folded, 6 comes opposite to 1, 4 comes opposite to 3, and 5 comes opposite to 2.

Q: The net shown below can be folded into the shape of a cube. The face market with the letter L is opposite to the face marked with which letter ?

When we fold the given figure the cube will be as shown in the figure. It can be observed that \$M\$ comes opposite to \$L\$.The correct answer is option (a).

Q: Draw the net of the following cuboid:

The net of the given cuboid is shown below:

Q: State true or falseA cube is a 3-D object or shape that can be formed from the following nets.

A cube consists of six square faces, twelve edges, and eight vertices. When the square faces of a cube are separated at the edges and laid out flat, they make a two-dimensional figure called a net.The given net when folded will form a cube. So, option A is the correct answer.

Q: Draw at least three different nets for making cube.

A cube net is defined as the net in which if all the faces are folded over other, they make up a perfect cube

Q: Draw the net of a regular tetrahedron with side 6 cm.

The net of a regular tetrahedron with side 6 cm each is shown below:

Q: Select the INCORRECT match.

We can observe among the options given, that they are basically matching of a solid 3D figure with its unfolded figure.Hence, in each option, cube, cylinder, cone, pyramid, its 3D figure is unfolded to match it with them.But, in Option C, the cone should have been unfolded with the circle attached to the base (bottom) of triangle (slant surface), while the circle actually is shown attached to the top of the triangle.Hence, Option C is a incorrect match.