Предмет: Геометрия, автор: Raven12ru

Периметр равнобедренного треугольника равен 42 см, боковая сторона на 6 см больше основания. Найдите основание.

Ответы

Автор ответа: Gradobor

0

Периметр треугольника P = 2a+b , где а - сторона, b - основание.
По условию a=b+6;
P = 2(b+6) + b
P = 2b+12+b
P=3b+12
42-12=3b
b=10. Основание 10 см.

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Русский язык, автор: Аноним

Пожалуйста помогите
Задание:
Исправь ошибки, правильно употребив личные местоимения. Ошибки допущенные во всех предложениях. ( если в предложении ошибок нет то перепиши фразу без изменений)

6 лет назад

Предмет: Русский язык, автор: Azryjg

Пожалуйста подскажите пожалуйста помогите пожалуйста

6 лет назад

Предмет: Английский язык, автор: vikamel27

Помогите пожалуйста , у меня завтра тест
Choose the correct item .
2 We ..... the windows and the car all
Saturday morning.
a) were cleaning
b) cleaned
c) had cleaned
3 I .... in York in 1998.
a) had worked
b) was working
c) worked
4 I .... you in your office with a girl!-Really? We....
a) saw-had just talked
b) had seen -just talked
c) saw - were just talking
5 As he .... a bike, a dog .... him .
a) was riding -bit
b) rode - bit
c) was riding - has bitten
6 When the dog.... him, he.... his bike.
a) was biting - fell off
b) bit-was falling off
c) bit - fell off
7 I didn't notice that you ....
a) had come
b) came
c) were coming
8 They .... a hotel in York, but then they.... it.
a) had bought- sold
b) bought-have sold
c) bought - sold
9 She couldn't play yesterday because she .... her ankle the day before.
a) was spraining
b) sprained
c) had sprained
10 The sun .... and we .... on the white sand.
a) shone - were lying
b) was shining-were lying
c) shined - lay
11 She's hurt her arm. - When .... it?
a) has she hurt
b) has she hurted
c) did she hurt
12 At 9.30 I .... a documentary on TV. It .... at 9.20.
a) was watching - had started
b) watched - has started
c) watched - started

6 лет назад

Предмет: Математика, автор: Аноним

3 1/8 : ( х - 4 7/24) = 17/18 + 1 5/6

9 лет назад

Предмет: Алгебра, автор: konoplik

Розкласти на множники!! Разложить на множители!!
1) 64м(в квадрате) -- 25n (в квадрате)

2) 25а(в квадрате) + 10аb + b(в квадрате)

9 лет назад