annashirley annashirley
  • 10-08-2017
  • Mathematics
contestada

PLEASE HELP TIME RUNNING OUT 15 POINTS

What is the length of SR?
9 units
12 units
15 units
18 units

PLEASE HELP TIME RUNNING OUT 15 POINTS What is the length of SR 9 units 12 units 15 units 18 units class=

Respuesta :

choixongdong
choixongdong choixongdong
  • 10-08-2017
RT = sqrt(20^2 - 16^2)
RT = sqrt(400 - 256)
RT = sqrt(144)
RT = 12

SR/ST=  QR/QT
SR/12 = 20/16
SR = 12 x 20 / 16
SR = 240/16
SR = 15

answer is C.
15 Units


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