Mathematics
If a solid shape is completely bounded by plane faces, then the least number of faces it may have is
3
4
5
6
Answer
A solid bounded by plane faces is called a polyhedron. The minimum number of faces needed to enclose a 3-D region with plane faces is 4 (as in a tetrahedron or triangular pyramid).
A triangular pyramid (tetrahedron) has exactly 4 triangular faces.
Hence, option 2 is the correct option.
Related Questions
Which of the following statements is correct?
Every rhombus is a square.
Every parallelogram is a rectangle.
Every square is a rhombus.
Every rectangle is a square.
A quadrilateral whose each angle is a right angle is a
trapezium
parallelogram
rhombus
rectangle
Statement I: The sum of two right angles and one acute angle is a reflex angle.
Statement II: 135° is an obtuse angle.
Statement I is true but statement II is false.
Statement I is false but statement II is true.
Both Statement I and statement II are true.
Both Statement I and statement II are false.