Bonjour pourriez-vous m'aider je comprends pas grand chose de mon dm de physique chimie Merci​

Réponse:

A round thali has 2 inbuilt triangular for serving vegetables and a separate semi-circular area for keeping rice or chapati. If radius of thali is 21 cm, find the area of the thali that is shaded in the figure. Read more on Sarthaks.com - https://www.sarthaks.com/178116/round-thali-inbuilt-triangular-serving-vegetables-separate-circular-keeping-rice-chapati