A triangle can be constructed by taking its sides as:
(a) 1.8 cm, 2.6 cm, 4.4 cm (b) 2 cm, 3 cm, 4 cm
(c) 2.4 cm, 2.4 cm, 6.4 cm (d) 3.2 cm, 2.3 cm, 5.5 cm
A triangle can be constructed by taking two of its angles as:
(a) 110o , 40o
(b) 70o , 115o
(c) 135o , 45o
(d) 90o , 90o
The order of rotational symmetry in the Fig. 12.15 given below is
(a) 4 (b) 8 (c) 6 (d) Infinitely many
The order of rotational symmetry in the figure 12.16 given below is
(a) 4 (b) 2 (c) 1 (d) Infinitely many
The name of the given solid in Fig 12.17 is:
(a) triangular pyramid (b) rectangular pyramid (c) rectangular prism (d) triangular prism
The name of the solid in Fig. 12.18 is:
(a) triangular pyramid (b) rectangular prism
(c) triangular prism (d) rectangular pyramid
A solid that has two opposite identical faces and other faces as parallelograms is a
(a) prism (b) pyramid (c) cone (d) sphere
The solid with one circular face, one curved surface and one vertex is known as:
(a) cone (b) sphere (c) cylinder (d) prism
If three cubes each of edge 4 cm are placed end to end, then the dimensions of resulting solid are:
(a) 12 cm × 4 cm × 4 cm (b) 4 cm × 8 cm × 4 cm
(c) 4 cm × 8 cm × 12 cm (d) 4 cm × 6 cm × 8 cm
When we cut a corner of a cube as shown in the figure 12.19, we get the cutout piece as :
(a) square pyramid (b) trapezium prism
(c) triangular pyramid (d) a triangle
If we rotate a right-angled triangle of height 5 cm and base 3 cm about its height a full turn, we get
(a) cone of height 5 cm, base 3 cm
(b) triangle of height 5 cm, base 3 cm
(c) cone of height 5 cm, base 6 cm
(d) triangle of height 5 cm, base 6 cm
If we rotate a right-angled triangle of height 5 cm and base 3 cm about its base, we get:
(a) cone of height 3 cm and base 3 cm
(b) cone of height 5 cm and base 5 cm
(c) cone of height 5 cm and base 3 cm
(d) cone of height 3 cm and base 5 cm
When a torch is pointed towards one of the vertical edges of a cube, you get a shadow of cube in the shape of
(a) square (b) rectangle but not a square
(c) circle (d) triangle
Which of the following sets of triangles could be the lengths of the sides of a rightangled triangle:
(a) 3 cm, 4 cm, 6 cm (b) 9 cm, 16 cm, 26 cm
(c) 1.5 cm, 3.6 cm, 3.9 cm (d) 7 cm, 24 cm, 26 cm
In which of the following cases, a unique triangle can be drawn
(a) AB = 4 cm, BC = 8 cm and CA = 2 cm
(b) BC = 5.2 cm, ∠B = 90° and ∠C = 110°
(c) XY = 5 cm, ∠X = 45° and ∠Y = 60°
(d) An isosceles triangle with the length of each equal side 6.2 cm.
Take a square piece of paper as shown in figure (1). Fold it along its diagonals as shown in figure (2). Again fold it as shown in figure (3). Imagine that you have cut off 3 pieces of the form of congruent isosceles right-angled triangles out of it as shown in figure 4.
On opening the piece of paper which of the following shapes will you get?
Rhombus is a figure that has ______lines of symmetry and has a rotational
symmetry of order _______.
__________ and __________ are the capital letters of English alphabets that have one line of symmetry but they interchange to each other when rotated through 180°.
Out of __________ faces of a triangular prism, __________are rectangles and __________ are triangles.
Identical cubes are stacked in the corner of a room as shown below. The number of cubes that are not visible are _____.
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