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

It is a triangular pyramid ⇒ Answer B

Step-by-step explanation:

* Lets describe the solid

- It has three lateral faces

- It has one base

* We have two solids with one base pyramid or cone, but the

 cone has no lateral faces

∴ It is a pyramid

* lets check the type of the pyramid

- The solid has four congruent isosceles triangles

* That means one base shaped isosceles triangle and three

  lateral faces shaped isosceles triangles

∴ It is a triangular pyramid

x = 23.78

step-by-step explanation:

answer: 193

explanation:

200-7 = 193