Объяснение:
the side surface of this pyramid consists of 6 isosceles triangles with a base 16 and a side 17.
Find the area of one triangle.
S = 1/2bh, where b is the base and h is the height.
The height is found by the Pythagorean theorem.
The height is equal to the square root of the difference between the squares of the side of the triangle and the half of the base. Half of the base 16 / 2 = 8
17*17 - 8*8 = 225. The square root of 225 is 15. The height of the triangle is 15. Then the area of the triangle will be equal to S = 1/2*16*15 = 120 and the area of the side surface of this pyramid is equal to the area of one triangle multiplied by 6. S1 = 120 * 6 = 720
Объяснение:
Well, maybe it will look like this:
everything is empty and all cities have stopped all possible production because 5 years have passed since the moment when they began to renew quarantine. And then that moment came, all the people left the houses after the announcement of the presidency that quarantine was finally over, everyone ran along the streets wherever: some to shops, some to rivers and ponds, and the most interesting thing is that everything has grown and gone, it’s like an opacalypse with zombies everywhere there is no rubbish nature was cleaned so that no one just recognized the street, birds were flying, animals were walking at home, and all this would not have happened if it had not been for quarantine, nature was cleaned !!! а теперь на русском
Ну возможно это будет выглядеть так:
все опустело и все города остоновили все возможные производства ведь с момента как начали продлевать карантин лет. И вот тот момент настал все люди вышли из домов послше обьявления презедента что карантин наконец закончен все побежали по улицам кто куда: ктото в магазины ктото на реки и водоемы а самое интересное что все зарасло и выгледло будто опакалипсис с зомби везде трава нет никого мусора природа так отчистилась что ни кто не узнал по улица летали птицы ходили животные как у себя дома и всего этого бы не было если бы не карантин природа отчистилась!!!