In the given figure, AB//DC, Prove that: ∆AED = ∆CEB.

no not all of them.

step-by-step explanation:

some of them have a square base.

do your own work and don"t cheat.

step-by-step explanation:

do a bckflip awfwgawgawggw

the area of the piece of paper =   27- inch square.

so, the length of the square piece of paper = = .

the side of the triangle cut = =

also the side of the small square cut =

so, the area of each triangle cut = 1/2 * .

so, the area of 4 triangles cut =

area of a small square cut =

total area of 4 triangles cut and a small square cut = 6+3 = 9 square inches.

reaming area of the octagonal window   = 27 - 9 = 18 square inches.