Cho ABC là tam giác cân tại A. Gọi D là trung điểm của BC. Trên đoạn AD lấy điểm E bất kỳ (E khác A và D). Qua E kẻ các đường vuông góc với AB và AC lần lượt tại M, N. a) Chứng minh tứ giác AMEN là hình vuông.

b) Chứng minh MN // BC.

c) Qua M kẻ đường thẳng vuông góc với DN tại F. Chứng minh góc AFE = 90 độ

d) Chứng minh B, E, F thẳng hàng.

c

step-by-step explanation:

i think because what else can be a sample of every member

all group life insurance is term insurance. actually it is annual renewable term and it is rated on the average age and claims experience of the entire group, which is called "experience rating." remember, this type of insurance has a 31-day grace period and is convertible to whole life upon leaving employment. a contributory group plan requires that both the employer and the employees pay part of the premium. at least 75% of those eligible must participate, so the group is sure to get most of the healthy employees as well as those that are sick.

step-by-step explanation:

here is a big fat

perimeter = 10 +  √10  units

explanation:

first, we will need to get the length of each line using the distance formula which is as follows:

distance = 

1- length of ab:

ab =   = 5 units

2- length of ac

length of ac is the same as ab = 5 units

3- length of bc:

bc =   =  √10  units

now, we can get the perimeter by adding the side lengths as follows:

perimeter = 5 + 5 +  √10

perimeter = 10 +  √10  units

hope this : )

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