Find the arc length of the semicircle.
either enter an exact answer in terms of tt or use 3.14 for tt and enter your answer as a decimal.

Measures of the angle of r, 31 s (x+4) t (3x+9)

If m_b=mzd= 43, find mzc so that quadrilateral abcd is a parallelogram o 86 137 o 129 43 description

Indicate the equation of the given line in standard form. the line containing the longer diagonal of a quadrilateral whose vertices are a (2, 2), b(-2, -2), c(1, -1), and d(6, 4).