Определите длину меньше боковой стороны прямоугольной трапеции если один из углов трапеции равен 45, меньшее основание - 4, 1 см , большее основание - 7, 3см​

3,2 см

Объяснение:

АВСД-трапеция, ∠А=∠В=90, ВС=4,1 см , АД=7,3 см, ∠Д=45.

Меньшая боковая сторона это ВС.

Пусть КН⊥АД. Тогда АН=4,1 см , а НД=7,3-4,1=3,2 см  .АВСН  будет прямоугольником .

ΔСНД-прямоугольный и равнобедренный, т.к и другой угол будет 45 градусов⇒НД=НС=3,2 см

Camping holidays are becoming more and more popular because they have a lot of advantages.  First of all they are not so expensive as package tours.  You can take a car, or a bus, or a bicycle or even a cart drawn by a horse to travel to the countryside. .  Sometimes tourists can walk long distances and it is free of charge.
If you go camping, you can choose places.  Some places can be deserted and unspoilt.  So we can enjoy fresh air and nice landscape with few or no people around.  Nothing will prevent us from exploring the unknown places.  Camping can also help us develop new skills.  Making a fire, looking for berries and mushrooms, fishing - all these are not only some kind of work but also a lot of fun.  

Dear Clare,

Thanks for your letter, it was really a surprise for me. I'm sorry I haven't answered you earlier, but I was really busy with my school work.

What can I say about my family? Well, my family is quite friendly. We usually gather together to celebrate some holidays. It may be three or four times a month. Most of all we like to watch different films and concerts, some sport competitions and to have dinner or lunch together. Also we like walking in the park or spending time near a lake or on the bank of the river. I like our family picnics very much. We always take a lot of photos when we have a rest in the mountains or by the lake. We sometimes arrange our birthday parties in the country.

Well, I hope your Granny is well, isn't she? What can you say about her birthday party? Did you organize it in the way for her to be pleased?  What do you usually like to do when you meet altogether? Do you like to have fun?

Well, I finish now because I have to do my homework. So, I hope you write to me soon.

Best wishes,

Denis