Answer:
$12$ km
Step-by-step explanation:
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4 is correct with the perfect reasoning.
5 says SRT is the same as STR
So SRT = 20
STR = 20
Now if STR is 20, then STU has to be 160 because the two angle have to add up to 180 to make a straight line
So 160 has to equal 4X
4x=160
X=40
<span>An exterior angle of a triangle is equal to the sum of the opposite interior
angles </span>⇒ x = 30 + 90 = 120°
What is the irregular shape supposed to be