Chu vi 1 tam giác là 60cm. Cao đường có độ dài là 12cm; 15 cm; 20 cm. Tính độ dài mỗi cạnh của tam giác đó.

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

Hurrya vegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide if one bag of gravel covers 9 square feet how many bags are needed to cover the path