The short stairwell is made of solid concrete. the height and width of each step is 3 ft and the length is 5 ft. whats the total volume of the stairwell? a. 90 cubic ft
b. 135 cubic ft
c. 150 cubic ft
d. 225 cubic ft

☁️ Answer ☁️

annyeonghaseyo!

The answer is:

135 cubic feet.

Hope it helps.

Have a nice day noona!~ ￣▽￣❤️

< 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)