In the given figure, line p is parallel to line q. Identify all the pairs of alternate exterior angles.

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota