make affirmative (positive) sentences in present perfect continuous using the information given. remember to use punctuation marks(full stops) at the end of the sentences.
1. chris / squash / play
2. they / in the park / wait
3. it / rain / all week
4. john and james / a race / run
5. we / ski / in the woods
1. it is colder today than yesterday. сегодня холоднее чем вчера.
2. he is taller than his father. он выше чем его отец.
3. my sister is older than me. моя сесра старше чем я.
4.this room is more comfortable than that one. эта комната более комфортабельная чем та.
5.this task is more difficult than that one. это труднее чем то.
6. jack is more pleasant than his brother. джек приятнее чем его брат.7. peter is the most pleasant person in the family. питер самый приятный человек в семье. 8. john is my best friend. джон мой лучший друг. 9. she is the prettiest girl in the world. она самая хорошенькая девочка в мире. 10. it was the happiest day in my life. это был самый счастливый день в моей жизни. 11. my father is the smartest person in my family. мой папа самый умный человек в моей семье. 12. the british museum is the most interesting place in london.
британский музей самое интересное место в лондоне.
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