Which distance measures 7 units?
1 answer:
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Answer:
Option B
Step-by-step explanation:
|-1| -1
|-1| = 1
Focus on triangles DFC and DFE:
- They are both right triangles because DF is perpendicular to EC
- DC=DE
- DF is a common side
So, the two triangles are congruent. It follows that CF=FE, and in particular
And since x=3, the length of EF is