a = √1² + 2²
a = √1 + 4
a = √5
a ≈ 2.23
b = 4
c = √3² + 2²
c = √9 + 4
c = √13
c ≈ 3.6
P = a + b + c
P = 2.23 + 4 + 3.6
P = 6.23 + 3.6
P = 9.83
Perimeter of ΔBDE = 9.83 units
i would like to see the picture to be exsact but you didnt put it up so that is ok
i hope this helps :)
