Длина высоты ad треугольника авс в два раза меньше длины стороны вс, может ли угол а быть тупым?

Если проведем высоту, то мы получим два прямоугольных триугольника. в каждом треуогльнике одна ия сторон будет ровняться 90 а сумма остальных двух будет ровняться 90 . так как ни одна сторона не может ровняться 0, каждый из этих углов будет меньше 90, что означает что угол a не может быть тупым

1.danced, opened, took , rained, had , washed, did ,watched ,cleaned ,went, made , was , got ,lived , wrote

2.we didn't go to Moscow last summer.

the children didn't have dinner at 2o'clock yesterday.

they didn't watch film last week/

I didn't get up at 8 o'clock yesterday.

it didn't rain two days ago

Ann didn't live in S.Petersburg last year/

She didn't read an untersting book the day before  yesterday.

I didn't my homework after school yesterday.

3.where  the children play in the garden yesterday?

did Tom write a latter three days ago&

What father cook dinneh yesterday&

Who mother go  to work by bus yesterday?

When we have a bath the day before yesterday?

Why Nick come home in the aafternoon?

What grandmother make tea in the morning?

4.1 We didn't have lunch at 1o'clock yesterday.Did we have lunch at 1o'clock yesterday? where we have lunch at 1 o'clock  yesterday? Who have lunch at 1 o'clock yesterday?

4.2 It didn't show last week.Did it show last week? Where it show last week? Who ishow last week?

5/1 I halped the mom yesterday.

5/2 where you live last month?

5/3 Did they wake up at 7 am ?

5/4 We didn't go to school yesterday

5/5Who watch the TV on Sunday ?

 

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