Plz help worth 50points

A) (6,5)

Step-by-step explanation:

A parallelogram is a geometric shape where each diagonal forms two equivalent triangles.

A vertex is the highest point of something.  

Therefore, the vertex of this parallelogram is (6,5) as that is a diagonal line from the point (4,2) and it is at the highest point of the triangle.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true