Question

I really need help i dont get it like frfr

Answer 1

BC = 3

(i'm sorry if this doesn't make sense this is just how i think of it lol)

Explanation:

it states that AB ≅ CD and CD ≅ BC

this means that all of these line segments are equal to each other.

AB = BC = CD

equations are given for BC and CD:

BC = 2x + 1

CD = 4 - x

both of these equations are equal to each other because AB = BC = CD

to find the value of x, you have to set these two equations equal to each other.

`2x + 1 = 4 - x`

add x to both sides

`3x + 1 = 4`

subtract 1 from both sides

`3x = 3\\x = 1`

now that we know that x = 1, we can plug this value back into the equations

`2(1) + 1 = 2 + 1 = 3`

BC = 3

`4 - (1) = 4 - 1 = 3`

CD = 3