destineygarcia destineygarcia
  • 03-05-2018
  • Mathematics
contestada

How do i solve this?

How do i solve this class=

Respuesta :

jcherry99
jcherry99 jcherry99
  • 06-05-2018
Note
Tangents from an external point to a circle's circumference are equal.

So
WZ = WX

WZ = 5a + 12
WX = 7a + 5

7a + 5 = 5a + 12 Subtract 5 from both sides.
7a = 5a + 12 - 5
7a = 5a + 7 Subtract 5a from both sides.
7a - 5a = 7
2a = 7 Divide by 2
a = 7/2
a = 3.5



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