Алгебра
Английский
Биология
География
Геометрия
История
Русский
Обществознание
Физика
Химия
Информатика
Литература
МатематикаВопрос:
Доказать, что угол B равен углу C.
Ответ:
Рассмотрим треугольники ABE и CDE. Так как AB = CD и углы при вершинах A и D прямые, треугольники ABE и CDE равны по гипотенузе и катету. Следовательно, углы при вершинах B и C равны.
Похожие
- A. Fill in the correct word: * determined * curious * daring * patient * athletic * imaginative e.g. Peter is very imaginative. He comes up with the most amazing stories. 1 Don't be so _________! If he wants to tell you what happened, he will. 2 My sister is very _________. When she wants something she does everything she can to achieve it. 3 Be _________! We'll be out of here in a minute. 4 Michael goes skateboarding in winter and windsurfing in summer. He is very _________. 5 We did something _________ last weekend. We went bungee jumping!
- B. Underline the correct item. e.g. Jennifer is tall and slim/straight. 6 John is the young boy with the spiky/skinny blond hair. 7 Mum and Dad both have dark appearances/tans. 8 Justin and Julian are both well-build/well-built. 9 Claudia has a pretty face with brown, wavy eyes/hair. 10 My baby sister has cute pigtails/face. 11 My brother has long/big hair. 12 My uncle is really tall with a moustache/hair. 13 Adam has freckles/beard on his face. 14 My hair is shoulder-length/tall. 15 You have green eyes and curly/round blond hair.
- Утверждение под каким номером было ложно?
