Answer:
P=4+√5+√13 the answer is C
Explanation:
to find the perimeter , need to find the length(distance of the sides)
D=√(x2-x1)²+(y2-y1)²
D between BE and BD and ED
d of BE :
B(1,2) E(5,2)
D of BE = √(5-1)²+(2-2)²=√4²=4
BE=4
D of BD : (1,2) , (2,4)
D=√(2-1)²+(4-2)² = √1²+2² = √5
BD=√5
ED : (5,2) , (2,4)
d=√(2-5)²+(4-2)²=√-3²+2² =√13
ED=√13
the perimeter= BE+BD+ED
P=4+√5+√13