Point e belongs to diagonal ac of parallelogram abcd (labeled counterclockwise) so that ae: ec=2: 1. line be intersects cd at point f. find the ratio of df: fc.

Consider two triangles AEB and CEF. In these triangles:

Thus, by AAA theorem,

Corresponding sides of similar triangles are proportional, then

ABCD is a parallelogram, then AB=CD.

Therefore,

CD=2CF and CD=DF+CF. Equate these two expressions:

DF+CF=2CF,

DF=CF.

This gives you that DF:CF=1:1.

1:1

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

the answer is c.

step-by-step explanation: