Big Ideas Math Geometry, 2014
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Big Ideas Math Geometry, 2014 View details
4. The Triangle Midsegment Theorem
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Exercise 9 Page 333

A midsegment connects two midpoints.

x=6

Practice makes perfect

We are told that DE is a midsegment of â–ł ABC. This means that D is a midpoint of BC and E is a midpoint of AC.

Therefore, AE and EC have equal lengths. This allows us to write an equation. AE=EC Now, we can find the value of x by substituting the given values into this equation.
AE=EC
6= x
x=6