They are always on a coplanar
Answer:
343 can be written as

Step-by-step explanation:
since we know,
343 = 7 × 7 × 7
so, we can write 343 as cube of 7
hence,

Well you'd see if it's closer to 10000 or 20000.
In this case it would round to 20000.
18 units squared multiply 6 times 3 to get this answer- 18u^2
The correct answer is b lave flows from a volcano and piles up