A, B, C and D are points on the circumference of a circle, centre O. ED is a tangent to the circle.
E
Angle ODB = 25°
А
Work out angle BAD.
You must give a reason for each stage
of your working.
250
D
B
С
Total marks: 4

PLEASE HELPPP

34

step-by-step explanation:

- "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."