Поделитесь своими знаниями, ответьте на вопрос:
1. The book was lying on the table. Book is a common nounBook is a proper nounBook is a collective noun2. Love begets love.Love is a common nounLove is a collective nounLove is an abstract noun3. We cannot live without water.Water is a common nounWater is a material nounWater is an abstract noun4. The jury has given its verdict.Jury is a collective nounJury is a common nounJury is an abstract noun5. The Hindus regard Krishna as an incarnation of Lord Vishnu.Hindus is a common nounHindus is a proper nounHindus is an abstract noun6. Alcohol is injurious to health.Health is a common nounHealth is an abstract nounHealth is a proper noun7. Smoking is a bad habit.Habit is a common nounHabit is a proper nounHabit is an abstract noun8. Wild animals live in forests.Animals is a common nounAnimals is a proper nounAnimals is an abstract noun9. The childhood of Peter was full of misery.Childhood is a common nounChildhood is an abstract nounChildhood is a proper noun10. All the girls were singing.Girls is a common nounGirls is a proper nounGirls is an abstract noun11. Gold is a precious metal.Gold is a proper nounGold is an abstract nounGold is a material noun12. Rice is the staple food of South Indians.Rice is a common nounRice is a material nounRice is an abstract noun13. The earth moves round the sun.Earth is a common nounEarth is an abstract nounEarth is a proper noun
ну, по свойству биссектрисы отрезки гипотенузы тоже относятся как 3/4. Пусть один из них 3*x, тогда 4*x, разность x = 5. Поэтому гипотенуза равна 7*5 = 35.
Катеты легко находятся из теоремы Пифагора при заданной пропорции, они равны 21 и 28. А площадь равна 294.
Задачу можно решить без каких-то "сложных" вычислений, если сразу увидеть, что отношение катетов 3/4 задает нам египетский треугольник, подобный (3,4,5). Сопоставляя эту тройку с длиной гипотенузы 35, видим, что длины сторон (21, 28, 35).