Which dimensions cannot create a triangle?

a
three angles measuring 90 degrees, 10 degrees, and 80 degrees
b
three angles measuring 30 degrees, 55 degrees, and 100 degrees
c
three sides measuring 7 cm, 9 cm, and 11 cm
d
three sides measuring 10 m, 16 m, and 10 m

B

Step-by-step explanation:

it adds up to 185

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)