In the diagram, K, L, and M are the midpoints of the sides of triangle symbol ABC. The vertices of the smaller shaded triangles are the midpoints of the sides of triangle symbol KBL, triangle symbol AKM, and triangle symbol MLC. The perimeter of triangle symbol ABC is 72 in. What is the perimeter of the shaded region?

i think it would be 42cm

- "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."

step-by-step explanation: