All of the following must be the same for congruent circles except a) center b) circumference c) diameter d) radius

Karianne and lucius are analyzing a linear function on a graph. karianne says that unit rate is equal to rate of change, but that slope is calculated differently. lucius says that unit rate, rate of change, and slope are calculated the same way. who is correct? explain your answer.

In which figure is de bc ? a. figure 1 b. figure 2 c. figure 3 d. figure 4

The triangles are similar. what is the value of x? show your work.