Arc cd is 2/3 of the circumference of a circle. what is the radian measure of the central angle?
2(pie)/3 radians
3(pie)/4 radians
4(pie)/3 radians
3(pie)/2 radians

12 point are triangles pqr and stu congruent? what is the congruency that proves they are congruent? what is the perimeter of triangle pqr?

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle. he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field