

Где центр этого круга?
Where is the center of this circle?
Сначала найдите центр фигуры.
First find the center of the shape.
Точка О — это центр квадрата.
Point O is the center of the square.
"центр" is in the lesson "Science" (Level 39), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.