I need help finding the angle measurements and side lengths.

right triangle

isosceles triangle

Step-by-step explanation:

The  box in the corner means that this triangle is a right triangle.  It is a 90 degree angle

We know this is an isosceles triangle since the two sides have the lines  on them.  Those marks means it has the same side length.

after simplifying it i got: -36.25 as my answer. hope that !

- "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."