Can a polyhedron have for its faces: 3 triangles?             (ii) 4 triangles? a square and four triangles?

Can a polyhedron have for its faces(i) 3 triangles?(ii) 4 triangles?(iii) a square and four triangles?

Can a polyhedron have 14 faces, 24 edges and 33 vertices?

Can a polyhedron have 8 faces, 26 edges and 16 vertices ?

Can a polyhedron have 10 faces, 20 edges and 15 vertices?

Can a polyhedron have 10 faces, 20 edges and 15 vertices?

Which of the following statements are true (T) and which are false (F): Sum of the three angles of a triangle is 180^0 A triangle can have two right angles. All the angles of a triangle can be less than 60^0 All the angles of a triangle can be greater than 60^0 All the angles of a triangle can be equal to 60^0 A triangle can have two obtuse angles. A triangle can have at most one obtuse angles. In one angle of a triangle is obtuse, then it cannot be a right angled triangle. An exterior angle of a triangle is less than either of its interior opposite angles. An exterior angle of a triangle is equal to the sum of the two interior opposite angles. An exterior angle of a triangle is greater than the opposite interior angles

A triangle having all sides of different length is known as (a) scalene triangle (b) isosceles triangle (c) an equilateral triangle (d) an acute triangle

If in two right triangles, one of the acute angles of one triangle is equal to an acute angle of the other triangle. Can you say that two triangles will be similar? Why?

In a squared sheet, draw two triangles of equal areas such that(i) the triangles are congruent.(ii) the triangles are not congruent.What can you say about their perimeters?

In each of the following, state if the statement is true (T) or false (F). A triangle has three sides A triangle may have four vertices. Any three line-segment make up a triangle The interior of a triangle includes its vertices. The triangular region includes the vertices of the corresponding triangle. The vertices of a triangle are three collinear points. An equilateral triangle is scalene. Every right triangle is scalene. Each acute triangle is equilateral. No isosceles triangle is obtuse.