110k views
0 votes
DEF is shown on the coordinate plane below.

D(-9,8)
E(9,5)
F(-5,-9)
What is the perimeter of DEF? If necessary, round your answer to the nearest tenth.

1 Answer

7 votes

Answer:

55.5

Explanation:


DE=√((-9-9)^2+(8-5)^2)=√(333) \\ \\ DF=√((-9-(-5))^2+(-9-8)^2)=√(305) \\ \\ EF=√((-5-9)^2+(-9-5)^2)=√(392)

The perimeter is thus
√(333)+√(305)+√(392) \approx 55.5.

User Gareth Wilson
by
8.3k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories