Answer:
D) 10
Step-by-step explanation:
Singe a right triangle has to be 90 degrees, 60+(3*10)=90:)
therefore x=10
D
the angles 60 and 3x form a right angle , then
60 + 3x = 90 ( subtract 60 from both sides )
3x = 30 ( divide both sides by 3 )
x = 10 → D
