Bob placed three regular pentagons together at a vertex, thinking he might be able to form a tessellation. However, they left a gap. What is the number of degrees in the measure indicated? [asy]size(100);
path A = dir(0) -- dir(72) -- dir (144) -- dir(216) -- dir (288) -- cycle;
path B = reflect ( dir(72), dir(144)) * A;
path C = reflect( dir(72), dir(0))* A;
draw(rotate(18) *A);
draw(rotate(18) *B);
draw(rotate(18) *C);
label("?", (0,1.5), N);
[/asy]
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Bob placed three regular pentagons together at a vertex, thinking he might be able to form a tessellation. However, they left a gap. What is the number of degrees in the measure indicated? [asy]size(100);
path A = dir(0) -- dir(72) -- dir (144) -- dir(216) -- dir (288) -- cycle;
path B = reflect ( dir(72), dir(144)) * A;
path C = reflect( dir(72), dir(0))* A;
draw(rotate(18) *A);
draw(rotate(18) *B);
draw(rotate(18) *C);
label("?", (0,1.5), N);
[/asy]
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
36^\circ
Bob placed three regular pentagons together at a vertex, thinking he might be able to form a tessellation. However, they left a gap. What is the number of degrees in the measure indicated? [asy]size(100);
path A = dir(0) -- dir(72) -- dir (144) -- dir(216) -- dir (288) -- cycle;
path B = reflect ( dir(72), dir(144)) * A;
path C = reflect( dir(72), dir(0))* A;
draw(rotate(18) *A);
draw(rotate(18) *B);
draw(rotate(18) *C);
label("?", (0,1.5), N);
[/asy]
train