Find the number of sides of a polygon if the sum of the measures of its interior angles is twice the sum of the measures of its exterior angle.

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

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

Question 3(multiple choice worth 1 points) use the arc length formula and the given information to find r. s = 16 cm, θ = 48°; r = ? sixty divided by pi cm thirty divided by pi cm one third cm one hundred twenty divided by pi cm