Calculate this whole thing pls

1.

a.25+90+60=175

Needs to add up to 180

X=5

b.90+30+24=144

180-144=36

X=36

2.

a.53+90+12.8=155.8

180-155.8=24.2

X=24.2

b.48.7+34+90=172.7

180-172.7=7.3

X=7.3

c.76.5+29+90=195.5

180-195.5=15.5

X=15.5

3.

a.90+42+33=165

180-165=15

X=15

b.42+33+90

square root

step-by-step explanation:

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.