Angles in a triangle total 180°
180=128+5x+10+9x
180-128-10=5x+9x
42=14x
x=3
Answer: The 2nd one on your right
Step-by-step explanation:
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Answer:
x=20. y=15
Step-by-step explanation:
in similar triangles the sides are all in proportion. this means:
so:
x=5×4
x=20
and...
y=3×5
y=15