(11) GCE architects are designing a circular race track with a circumference of 400 meters.
Inside this circular track, they are going to put a smaller circle with grass. What should the
inner circle's radius be if the grass portion has the same area as the non-grass portion?

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.

students group

step-by-step explanation:

a person who   joins a party or a seminar can explain his feelings about that particular occasion better more than anyone else.

as bella managed a show for the students in the school and invited students to watch that show

hence

students group will be the best group to survey to find this information

answer: they are supplementary angles

step-by-step explanation: 161+19=180. supplementary angles equal 180 degrees