Find the length (in centimeters) of a 90° arc in a circle where the diameter measures 70 centimeters.

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Which of the following is the result of expanding the series

If chord ab is congruent to chord cd, then what must be true about ef and eg?