2. Cho tam giác ABC. Các trung tuyến BM, CN cắt nhau tại G. Gọi I, K lần lượt là trung ​điểm của BG và CG. Chứng minh rằng IKMN là hình bình hành (Giải bằng 3 cách)

The area of a circle is equal to 1 dm². find the radius of the circle.

Without multiplying, tell which product is larger and why. 5 × 1/3 or 5 × 2/3 a)5 × 1/3 because 1/3 is less than 2/3 b) 5 × 1/3 because 1/3 is greater than 2/3 c) 5 × 2/3 because 1/3 is less than 23 d) 5 × 23 because 1/3 is greater than 2/3

Maria heard on the radio that the high temperature that day would be to determine the temperature in degrees celsius, she used the formula , where c is the temperature in degrees celsius and f is the temperature in degrees fahrenheit.