Если треугольник равнобедренный то значит две боковые стороны равны, периметр это сума все сторон так ведь? Значит боковую сторону легко найти. И так
это значит (25 периметр-9 основание) : 2 боковые стороны=8
ответ: боковая сторона равна 8 см
1.hot/hotter/ the hottest
2.beautiful/more beautiful/the most beautiful
3. happy/ happier/ the happiest
4/ brave/braver/ the bravest
5. fast/ faster/ the fastest
6. calm/ calmer/ the calmest
7. cool/ cooler/ the coolest
8. loud/ louder/ the loudest
9. short/ shorter/ the shortest
10. strong/ stronger/ the strongest
11/ dangerous/more dangerous/ the most dangerous
12. handsome /more handsome/ the most handsome
13. nice/ nicer/ the nicest
14. sarcastic/ more sarcastic/ the most sarcastic
15. bad/ worse/ worst
1. What is this?
2. It is Daddy's?
3. That is my doll?
4. They are mum's?
5. What is wrong?
6. They are pencil cases?
7. It is a tea set?
1-b)started
2-d)have never been
3-a)is
4-f)will you have finished
5-e)are being printed
6-c)is currently changing