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Please help. Will give 5 stars and brainliest. No bots please

Please Help Will Give 5 Stars And Brainliest No Bots Please class=

Sagot :

u = 60
you can make the green triangle into a fraction (28/42).
you can simply it by 14.
it will than be 2/3.
since both shapes are similar they are basically proportional to each other.
2/3 = 40/u
cross multiply,
you get u=60