What type of triangle is formed by joining the points D(7, 3), E(8, 1), and F(4, -1)?
A.
equilateral triangle
B.
isosceles triangle
C.
right triangle
D.
acute scalene triangle
E.
obtuse scalene triangle

A

Step-by-step explanation:

the answer is A

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7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation:

step-by-step explanation:

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