MATHS BLANKS [1 Marks Each]

Isosceles triangle is a figure that has a line of symmetry but lacks rotational symmetry.

Solution:

An isosceles triangle is a figure that has a line of symmetry but lacks rotational symmetry.

The corners of solid shapes are called its vertices.
Solution:

The corners of solid shapes are called its vertices.

The common portion of two adjacent faces of a cuboid is called edge.
Solution:

The common portion of two adjacent faces of a cuboid is called edge.

The base of a triangular pyramid is a triangle.
Solution:
The base of a triangular pyramid is a triangle.

Rhombus is a figure that has two lines of symmetry and has a rotational symmetry of order two.

Solution:

A rhombus has two lines of symmetry along the diagonal and has a rotational symmetry of order two.

Out of 5 faces of a triangular prism, 3 are rectangles and 2 are triangles.
Solution:
Out of 5 faces of a triangular prism, 3 are rectangles and 2 are triangles.

Out of 5 faces of a square pyramid, 4 are triangles and 1 is/ are squares.
Solution:
Out of 5 faces of a square pyramid, 4 are triangles and 1 is/ are squares.

Out of 5 faces of a rectangular pyramid 4 are triangles and base is rectangle.
Solution:
Out of 5 faces of a rectangular pyramid 4 are triangles and base is rectangle.

Order of rotational symmetry of a rectangle is two.
Solution:
Order of rotational symmetry of a rectangle is two.

Order of rotational symmetry of a circle is 2.

Solution:

Since, the number of times a figure fits onto itself in one complete rotation is called the order of rotational symmetry.

Order of rotational symmetry of a circle is 2.

Line of symmetry for an angle is its angle bisector.
Solution:
Line of symmetry for an angle is its angle bisector.

Scalene Triangle is a figure that has neither a line of symmetry nor a rotational symmetry.
Solution:
Scalene Triangle has all sides unequal and hence it has not lines of symmetry or rotational symmetry. Scalene Triangle is a figure that has neither a line of symmetry nor a rotational symmetry.

In an isosceles right triangle, the number of lines of symmetry is One.

Solution:

An isosceles triangle has only one line of symmetry drawn from the vertex touching the base as shown in the figure:

In an isosceles right triangle, the number of lines of symmetry is one.

Identical cubes are stacked in the corner of a room as shown below. The number of cubes that are not visible are 20.

Solution:

The number of cubes that are not visible are 20.

Each of the letters H, N, S and Z has a rotational symmetry of order two.

Solution:

Each of the letters H, N, S and Z has a rotational symmetry of order two.

Cuboid is a rectangular prism.
Solution:
Cuboid is a rectangular prism. Rectangular prism and cuboid are same solids.

A triangular pyramid has 4 faces, 6 edges and 4 vertices.
Solution:
A triangular pyramid has 4 faces, 6 edges and 4 vertices.

A triangular prism has five faces, nine edges and six vertices.
Solution:
A triangular prism has five faces, nine edges and six vertices.

A scalene triangle has no lines of symmetry.

Solution:

Since, all the angles and sides are unequal in scalene triangle.

Order of rotational symmetry of is 1.
Solution:
Since, isosceles triangle has rotational symmetry of order 1.

is a net of a triangular prism.
Solution:

is a net of a triangular prism.

is a net of a

. Circumference of circle =

A square pyramid has 5 faces, 8 edges and 5 vertices.
Solution:
A square pyramid has 5 faces, 8 edges and 5 vertices.

A sphere has 0 vertex, 0 edge and 1 curved surface.
Solution:
A sphere has 0 vertex, 0 edge and 1 curved surface.

A solid with no vertex is sphare.

Solution:

Since, a sphere is a solid with 0 vertex, 0 edge and 1 curved surface.

A plane surface of a solid enclosed by edges is called face.
Solution:
A plane surface of a solid enclosed by edges is called face.

A parallelogram has no line of symmetry.

Solution:

A parallelogram has no line of symmetry.

M and W are the capital letters of English alphabets that have one line of symmetry but they interchange to each other when rotated through 180°.

Solution: