4 years ago

WILL GIVE BRAINIEST!!!!!!

Mathematics

1 answer:

zimovet [89]4 years ago

8 0

Answer:

C. Right-angle triangle

Step-by-step explanation:

Lengths:

DE = sqrt[(8-7)² + (1-3)²]

DE = sqrt(5)

DF = sqrt[(4-7)² + (-1-3)²]

DF = sqrt(25) = 5

EF = sqrt[(4-8)² + (-1-1)²]

EF = sqrt(20)

DF² = DE² + EF²

25 = 5 + 20

25 = 25

Satisfies pythagoras theorem

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