_ A'B'C' is a rotation of ABC 180° about the origin. What is the
length of A'C?
A.) 3 units
B.) 4 units
C.) 13 units
D.) 6 units

In pqr the obtuse angle is 105 and the shorter sides measure 4 and 7 units rounded to the nearest tenth what is the area of triangle pqr

The table shows a pattern of exponents. what is the pattern as the exponents decrease?

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 .