The pair of triangles that are congruent by the asa criterion is . the pair of triangles that are congruent by the sas criterion is .

to be congruent by ASA there must be 2 angles, and the corresponding side (the side connecting the two angles) must be congruent to the same of another triangle

To be congruent by SAS there must be two adjacent sides with the common angle of the two, congruent to these factors of the other triangle

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

1010: 3030

is it i think