Does this formula in blue make sense?
Do you understand how to find midpoint?

yes it makes since and the midpoint is the middle value between the two points.

Step-by-step explanation:

example

point 1 (2,3)

point 2 (6, -1)

midpoint

(2+6)/2 for x

(3+(-1))/2 for y

x = 8/2 = 4

y = 2/2= 1

so midpoint on line between 2 points is (4, 1)

nope.   happens to me as well.

-aparri

< xcy ≅ < xby

step-by-step explanation:

in δcax and δbax,

so, δcax ≅ δbax (side-angle-side or sas)

since δcax ≅ δbax, we can conclude < acx ≅ < abx

in δacy and δaby,

so, δacy ≅ δaby (side-angle-side or sas)

since δacy ≅ δaby, we can conclude < acy ≅ < aby

now,

< acy ≅ < aby

=> < acx + < xcy ≅ < abx + < xby

=> < acx + < xcy ≅ < acx + < xby   (since < acx ≅ < abx already proved above)

subtracting < acx from both sides, we get

< acx + < xcy -< acx ≅ < acx + < xby -< acx

cancelling out < acx and -< acx from both sides, we get

< xcy ≅ < xby (proved)