Answer:
BE= 9.7 AD=23.1 perimeter=70.2
Step-by-step explanation:
we can use the Pythagorean theorem for this (a^2+b^2=c^2)
lets start with the triangle DAC (AD)
A=22 b=7 c=x
[tex]22^2+7^2=x^2[/tex]
[tex]x^2=533\\\sqrt{x^2} =\sqrt{533}[/tex]
x=23.087 (23.1 rounded)
then we find the missing side of the last triangle (BE)
[tex]x^2+7^2=12^2[/tex]
[tex]x^2+49=144\\x^2=95\\\sqrt{x^2} =\sqrt{95}[/tex]
x=9.747 (9.7 rounded)
we then add all the missing sides (perimeter)
23.087*2+12*2=70.174 then we can round to 70.2
