Understanding Elementary Shapes

In triangle ABC, if AB=AC=3 cm and BC=5 cm, the triangle has

1. one line of symmetry
2. two lines of symmetry
3. three lines of symmetry
4. four lines of symmetry

An angle is symmetrical about its

1. perpendicular bisector
2. angle bisector
3. interior angle
4. exterior angle

A line segment is symmetrical about its

1. perpendicular bisector
2. angle bisector
3. parallel line
4. intersecting line

The line about which the figure is symmetrical is called

1. symmetry
2. a line of symmetry
3. perpendicular
4. parallel

An English alphabet which has a line symmetry is

1. C
2. N
3. R
4. P

A figure with both line symmetry and rotational symmetry is

1. triangle
2. circle
3. rhombus
4. quadrilateral

The English alphabet which looks the same after reflection is

1. A
2. B
3. H
4. R

Plane mirror produces an image of the same shape and size but in opposite sense. This is called

1. symmetry
2. line of symmetry
3. reflection
4. rotation

If a line divides a figure into two identical halves, the line is said to be

1. symmetry
2. line of symmetry
3. angle of symmetry
4. reflection

A cuboid has

1. 2 faces, 4 edges and 6 vertices
2. 4 faces, 6 edges and 6 vertices
3. 5 faces, 10 edges and 8 vertices
4. 6 faces, 12 edges and 8 vertices

A square pyramid has

1. 2 faces and 6 edges
2. 4 faces and 6 edges
3. 5 faces and 8 edges
4. 5 faces and 10 edges

A solid cone has

1. 1 face
2. 2 faces
3. 3 faces
4. 4 faces

The shape of a basketball is a

1. Cube
2. Cone
3. Sphere
4. Cylinder

In a triangle ABC, a + b + c = ?

1. 50°
2. 60°
3. 100°
4. 180°

A triangle with angles 60°, 45° and 75° is a/an

1. Acute angled triangle
2. Reflex angled
3. Obtuse angled triangle
4. Right angled triangle

A triangle with sides 5 cm, 5 cm and 5 cm is a/an

1. Scalene triangle
2. Isosceles triangle
3. Equilateral triangle
4. Right angle triangle

Three edges which meet at a point in a 3D shape is called a/an

1. Edge
2. Face
3. Vertex
4. Corner

Two faces of a 3D shape meet at a line segment called a/an

1. Edge
2. Face
3. Vertex
4. Corner

Each flat surface of a 3-dimensional shape is called a/an

1. Edge
2. Face
3. Vertex
4. Corner

If the two angles of a triangle are 45° and 60°, then the third angle is

1. 25°
2. 45°
3. 65°
4. 75°

If the angles of a triangle are in the ratio 3:4:5, then the angles are respectively

1. 35°, 65° and 80°
2. 40°, 65° and 75°
3. 45°, 60° and 75°
4. 55°, 55° and 70°

In triangle ABC, if ∠A = ∠B and ∠C = 50°, then ∠A and ∠B respectively equal

1. 60° and 70°
2. 50° and 50°
3. 60° and 60°
4. 65° and 65°

At 1:00 pm the angle made between the arms of a clock is a/an

1. Acute angle
2. Reflex angle
3. Obtuse angle
4. Straight angle

A triangle in which all the sides are equal is called a/an

1. Scalene triangle
2. Isosceles triangle
3. Equilateral triangle
4. Right angle triangle

A triangle which has two sides equal is called a/an

1. Scalene triangle
2. Isosceles triangle
3. Equilateral triangle
4. Right angle triangle

In a triangle, if the lengths of all the sides are different, then it is called a/an

1. Scalene triangle
2. Isosceles triangle
3. Equilateral triangle
4. Right angle triangle

The line passing through the mid-point of a given line segment and also perpendicular to it is called

1. Intersecting line
2. Parallel line
3. Perpendicular
4. Perpendicular bisector

When two lines intersect and the angle between them is a right angle, then the lines are said to be

1. Intersecting
2. Parallel
3. Perpendicular
4. Perpendicular bisector

If an angle measures 200°, then the angle is a/an

1. Acute angle
2. Reflex angle
3. Obtuse angle
4. Straight angle

If an angle measures 56°, then the angle is a/an

1. Acute angle
2. Reflex angle
3. Obtuse angle
4. Straight angle

If an angle measures 97°, then the angle is a/an

1. Acute angle
2. Reflex angle
3. Obtuse angle
4. Straight angle

An angle measuring 180° is called a

1. Complete angle
2. Reflex angle
3. Straight angle
4. Zero angle

One revolution equals

1. 90°
2. 180°
3. 270°
4. 360°

The measure of a right angle is

1. 45°
2. 60°
3. 90°
4. 180°

1 cm equals

1. 100 mm
2. 10 mm
3. 0.1 mm
4. 0.01 mm

One full turn of the hand of a clock is

1. 1 revolution
2. 1/2 revolution
3. 1/4 revolution
4. 3/4 revolution

The distance between two end points of a line segment is called its

1. Length
2. Width
3. Height
4. Thickness

If a clock hand starts from 12 and stops at 3, then it makes

1. 4 right angles
2. 3 right angles
3. 2 right angles
4. 1 right angle

A line segment has

1. One end point
2. Two end points
3. Three end points
4. Four end points

If a clock hand starts from 12 and stops at 6, then it makes an angle of

1. 0°
2. 45°
3. 90°
4. 180°