Solve the problem.
-A circle has a diameter with endpoints $( - 2,1 )$ and $( 4,9 )$. Find the radius.
A) $\sqrt { 10 }$
B) $\sqrt { 5 }$
C) 5
D) 10

Question

Quizplus · Accepted Answer

The radius is half the length of the diameter. First, find the length of the diameter using the distance formula: $\sqrt{(4 - (-2))^2 + (9 - 1)^2} = \sqrt{6^2 + 8^2} = \sqrt{36 + 64} = \sqrt{100} = 10$. The radius is half of this, so it is 5.

Solve the Problem (−2,1)( - 2,1 )(−2,1) And (4,9)( 4,9 )(4,9) Find the Radius

Solve the Problem $( - 2,1 )$ And $( 4,9 )$ Find the Radius