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Godsgirl
 4 years ago
What is the length of side BC?
A: 6
B: 21
C: 9
D: 15
Godsgirl
 4 years ago
What is the length of side BC? A: 6 B: 21 C: 9 D: 15

This Question is Closed

cc104567
 4 years ago
Best ResponseYou've already chosen the best response.0\[a^{2}+b ^{2}=c ^{2}\] \[15^{2}+\left( x+6 \right)^{2}=x ^{2}\] use foil

lcf1999
 4 years ago
Best ResponseYou've already chosen the best response.0those lines there mean that the two sides are congruent and x would be 15 and 15 plus 6 is 21 so the answer is 21.
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