33 Questions
What shape is represented by the net in Fig 15.6?
Cone
What type of shape does the Great Pyramid in Giza have?
Pyramid
How many correct nets are there in Fig 15.10 to make a tetrahedron?
Two
What is the rule for the total number of dots on opposite faces of a die?
Seven
What is the maximum number of faces a cube can have?
Six
What is the importance of cutting along the slant surface to get a net for a cone?
To unfold the cone into a 2-D shape
How are the measurements taken care of in an isometric sketch?
The measurements are of exact size in an isometric sketch.
What is the difference between an isometric sketch and an oblique sketch in terms of measurement accuracy?
Measurements are of exact size in an isometric sketch, while this is not the case in an oblique sketch.
What is the purpose of connecting matching corners with appropriate line segments in an isometric sketch of a cuboid?
To form an isometric sketch of the cuboid.
How many units are taken along the 'length', 'breadth', and 'height' in the visualizing solid shapes?
Along the 'length': 1 unit, along the 'breadth': 1 unit, and along the 'height': 1 unit.
What dimensions are used for sketching an isometric sketch of a cuboid with 5 cm, 3 cm, and 2 cm?
5 cm, 3 cm, and 2 cm
How many cubes with a 2 cm edge are placed side by side to form a cuboid?
Three cubes with a 2 cm edge each.
What is the key observation made about the sizes of the front faces and their opposites in an oblique sketch of a cube?
The sizes of the front faces and their opposites are the same.
What is highlighted about the edges in an oblique sketch of a cube?
The edges, which are all equal in a cube, appear equal in the sketch.
What kind of sheet is needed to make an isometric sketch of a solid with measurements that agree with the actual solid?
An isometric sheet is needed.
What is the purpose of an isometric dot sheet in drawing sketches?
An isometric dot sheet helps divide the paper into small equilateral triangles.
What are the dimensions of the cuboid used as an example for drawing on the isometric sheet?
4 cm length, 3 cm breadth, and 3 cm height.
What kind of faces does a cuboid have, and how are they represented in sketches?
A cuboid has rectangular faces, which are represented in sketches.
What shape of shadow is obtained when a ball is placed under a bulb?
Circle
What is the shape of the shadow obtained when a cylindrical pipe is placed under a bulb?
Rectangle
What shape of shadow is obtained when a book is placed under a bulb?
Rectangle
Which 3-D object matches the shadow of a circle when seen under an overhead projector?
Sphere, Cylinder
Which 3-D object matches the shadow of a square when seen under an overhead projector?
Cube
Which 3-D object matches the shadow of a triangle when seen under an overhead projector?
Pyramid
Which 3-D object matches the shadow of a rectangle when seen under an overhead projector?
Cuboid
Is the statement 'The cube can cast a shadow in the shape of a rectangle' true?
True
Is the statement 'The cube can cast a shadow in the shape of a hexagon' true?
False
What are examples of plane figures?
Circle, square, rectangle, quadrilateral, triangle
What are examples of solid shapes?
Cube, cuboid, sphere, cylinder, cone, pyramid
What are the three main components of a solid shape?
Vertices, edges, faces
What is a net in relation to a solid shape?
A net is a skeleton-outline that can be folded to make a solid.
What is meant by the 2-D representation of a 3-D solid?
Solid shapes can be drawn realistically on a flat surface like paper.
What are the two types of sketches of a solid that are possible?
Oblique sketch and isometric sketch
Learn how to create isometric and oblique sketches of cuboids by following step-by-step instructions. Practice drawing four parallel line segments of length 3 starting from the corners of a rectangle and connecting the matching corners with appropriate line segments.
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