2. Find the missing angle in each triangle
need it asap pls!!

A) 60°

B) 45°

C) 50°

Step-by-step explanation:

the sum of the internal angles of a triangle is 180 °, so the first is an equilateral triangle, so all angles are 60 °.

the second is a right isosceles triangle with an angle of 90 ° and two angles of 45 °.

the third is a right triangle with an angle of 90 °, one from 40 ° and x is 50 °.

- "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."