# Review 2.2, 2.5, 3.5, 4.1, 5.7 #21

### H. Honeycutt in Mr. Kirkland's Math II Class

21) A survivor needs to measure the distance, AB, across the lake. Beginning at E, he locates the midpoint, C, of AE and the midpint ,D, of BE. He then measures CD. What is AB?

Make a brace map of what you know...

CD is the midsegment of triangle ABE...

By replacing CD with 73 in the midsegment theorem, you multiply 73 by 2 and get 146 witch is equal to AB.