Answer:
B) 2\ sq.rt{3}units
Step-by-step explanation:
using Pythagoras theorem
a^2+ b^2=c^2
a^2+ 3^2=(√21)^2
a^2+9= 21
a^2=21-9
a^2=12
a=√12
a=2√3
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Answer:
PLZ HELP
Step-by-step explanation:
Circle A is located at (6, 5) and has a radius of 4 units. What is the equation of a line that is tangent to circle A from point C (2, 8)?
x = 2
y = −0.75x + 9.5
y = 1.33x + 1.66
x = 8
5*4^2-3*4*5=80-60=20
Hope that helps you
