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D(5, 7), E(4, 3), and F(8, 2) form the vertices of a triangle. What is mZDEF?
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D(5, 7), E(4, 3), and F(8, 2) form the vertices of a triangle. What is mZDEF?

User N Chauhan
by
8.5k points

1 Answer

3 votes

Answer:
m\angle DE F=90^(\circ)

Explanation:

The slope of
DE is
(7-3)/(5-4)=4.

The slope of
EF is
(3-2)/(4-8)=-(1)/(4).

Thus,
DE \perp EF, meaning
m\angle DE F=90^(\circ).

User Liushan CHEN
by
8.1k points
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