A triangle has vertices on a coordinate grid at B(-1,2)B(−1,2), C(-1,-2)C(−1,−2), and D(3,-2).D(3,−2). What is the length, in units, of \overline{BC} BC?

answer: the answer is 23

step-by-step explanation:

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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