Write (d+5)+(d+5)+(d+5)+(d+5) as an equivalent expression by grouping the like terms

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

Given: and prove: what is the missing reason in the proof? given transitive property alternate interior angles theorem converse alternate interior angles theorem