In an earlier lesson, you saw the equation V +F - 2 = E, which relates the number of vertices, faces, and edges in a Platonic solid. Write an equation that makes it easier to find the number of vertices in an octahedron (shown here), which has 8 faces.

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

answer   download the app called socratic on your phoner:

step-by-step explanation:

translate k to n and reflect across the line containing jk.

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.