denisekeith15 denisekeith15

25-09-2017
Mathematics

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Given that ab is a tangent if circle with center at x, ab=12, and xd=2.5, which is the length of db

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April135 April135

25-09-2017

so if u draw out the questions

so xbd is a triangle : so xb is 12/2 cm = 6 cm
xd is 2.5 cm and because of the Pythagoras theorem

6^2+2.5^2=bd^2
42.25=bd^2
bd=6.5

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