Question

В четырехугольнике авсд проведена диагональ ас,ав=сд,вс=ад, периметр треугольника авс=21см,ав=6см,ас=8см. Чему равна сторона ад? Помогитее пожалуйста,мне сегодня срочноо надо.! Заранее спасибо

Answer 1

У меня получилось,что периметр равен (А+в)*2=21.Так как сторона ав=6,то Р=(6+Х)*2=21.Тогда 6+Х=10,5.Тогда Х=4,5.

Answer 2

Given Information:

We are given the following information about the quadrilateral AVSD: - Diagonal AS is equal to diagonal AV, which is equal to diagonal SD. - The perimeter of triangle AVS is 21 cm. - Side AV is 6 cm. - Side AS is 8 cm.

Solution:

To find the length of side AD, we can use the fact that the perimeter of triangle AVS is equal to the sum of the lengths of its sides. Since we know the lengths of sides AV and AS, we can subtract their lengths from the perimeter to find the length of side VS. Then, using the fact that diagonal AS is equal to diagonal AV, we can find the length of side AD.

Let's calculate step by step:

1. Calculate the length of side VS: - Perimeter of triangle AVS = 21 cm - Side AV = 6 cm - Side AS = 8 cm

The length of side VS can be found by subtracting the lengths of sides AV and AS from the perimeter of triangle AVS: VS = Perimeter of triangle AVS - Side AV - Side AS VS = 21 cm - 6 cm - 8 cm VS = 7 cm

2. Calculate the length of side AD: - Diagonal AS = Diagonal AV = Diagonal SD = 8 cm

Since diagonal AS is equal to diagonal AV, we can conclude that side AD is equal to side VS: AD = VS AD = 7 cm

Therefore, the length of side AD is 7 cm.

Please let me know if you need any further assistance!