Luas bangun ABCD =... mohon bantuannya kak ,besok dikumpulin,

AC2 = AB2 + BC2
AC2 = 10^2 + 10^2
AC2 = 100 + 100
AC2 = 200
AC = √200
AC = 14,1 cm = 14 cm

AD2 = AC2 + CD2
AD2 = 14^2 + 14^2
AD2 196 + 196
AD2 = 392
AD = √ 392 = 19,79 = 20 cm

Luas ABCD = (10+ 20)/2 x 10
= 15 x10 = 150 cm2

A. 150 cm2