Question

Fill in the blanks with the help of options, given in the box.
I. In ____(P) sketch of the solid, the measurements are kept proportional.
II. A _____(Q) polygon has as many lines of symmetry as it has sides.
Ill. A _____(R) is a skeleton-outline of a solid that can be folded to make the solid.
IV. While rectangle is a 2-D figure, _____(S) is a 3-D figure.

• A. P- Oblique, Q- Regular, R- Net, S- Cuboid
• B. P- Isometric, Q- Irregular, R- Net, S- Cuboid
• C. P- Oblique, Q- Irregular, R- Net, S- Cuboid
• D. P- Isometric, Q- Regular, R- Net, S- Cuboid

Answer 1

The correct option is D P- Isometric, Q- Regular, R- Net, S- Cuboid

$I$ : An oblique sketch focuses more on the face while an isometric sketch focuses on the edges. In an $isometric$ projection of a 3D object, the measurements are kept proportional while in an oblique sketch it is not.

$II$ : A point has no line of symmetry while a line has two. Similarly, an equilateral traingle has 3, a square has 4, a regular pentagon has 5 and so on. So we can say a $regular$ polygon has as many lines of symmetry as it has sides.

$III$ : The skeleton outline of a 3D object drawn in two dimensions which can be folded to get the solid is called a $net$.

$IV$ : A rectangle has only length and breadth while a cuboid has length, breadth and height. So, rectangle is a 2D figure while a $cuboid$ is a 3D figure.