Предмет: Геометрия, автор: sashatambalaewa

Решите пожалуйста!! Геометрия 7 класс

Приложения:

Ответы

Автор ответа: Аноним
1

задание 1

угол в 64 градуса заменяем на смежный ему

угол в 114 градусов заменяем на вертикальный ему

получаем два накрест лежащих угла, но они не равны, значит прямые НЕ параллельны

задание 2

угол в 38 градусов заменяем на вертикальный ему

по условию прямые параллельны, значит сумма односторонних углов равна 180 градусам

получаем: 180-38=142

задание 3

угол abk= углу akb, так как треугольник abk-равнобедренный

если kb-биссектриса, то угол bkn= углу akb

bkn=abk, значит ab||kn при прямых ab и kn и секущей bk

доказано

Похожие вопросы
Предмет: Геометрия, автор: daralarionova930
Предмет: Английский язык, автор: egorkuksenok820
Привет :)
Помогите, пожалуйста перевести текст
What are you going to do? EDINBURGH CASTLE

The place to go if you like castles! Go on an interesting tour of the castle and admire spectacular views of the city as well as the Crown Jewels. Edinburgh Castle is also the home of the One O'Clock Gun. This is fired every day except Sunday at precisely 1:00 pm to provide everyone with an accurate¹ check for their clocks and watches!

THE MILITARY TATTOO2 EXPERIENCE

Don't miss the Military Tattoo Experience - the largest outdoor event in Scotland right in front of beautiful Edinburgh Castle! Enjoy a wonderful show of music and dance, pipers playing their bagpipes, bands parading, and men in kilts dancing to folk tunes!

THE MUSEUM OF CHILDHOOD

Described as 'the noisiest museum in the world', the Museum of Childhood is a favourite with adults and children. It is a treasure house full of objects, telling of childhood, past and present. There are toys and games of all kinds from many parts of the world, ranging from dolls and teddy bears to train sets and tricycles. Listen to the children chanting multiplication tables in the 1930s classroom and watch the street games Edinburgh children played in the 1950s.

DEEP SEA WORLD

Experience the 'underwater safari' of a lifetime! Go under the sea in a 71 metre transparent tunnel and get ready to see exciting sea life

close enough to touch it! SCOTLAND BALLOONING TOUR

Your chance to get a terrific view of Edinburgh. Fly in a hot air balloon and you will enjoy what you see!​
Предмет: Математика, автор: мурзик2008
Предмет: История, автор: StrokovAnna