Question

If a solid consists of three lateral faces and a base that are congruent isosceles triangles, what type of solid is it?. A. octahedron . B. triangular pyramid . C. right triangular pyramid . D. regular rectangular prism .

Answer 1

B. triangular pyramid.

Explanation:

-Octahedron has eight faces that are equilateral triangles, six vertices and twelve edges.

-Triangular pyramid has four triangular faces that have congruent isosceles triangles in which one of them is considered the base.

-Right triangular pyramid has a triangle base, three faces and six edges and the line that is located between the centre of the base and the vertex is perpendicular to the base.

-Regular rectangular prism has twelve sides, 8 vertices and six rectangular faces.

According to this, the answer is triangular pyramid.