Respuesta :

Step-by-step explanation:

here's the answer to your question

Ver imagen Аноним
Ver imagen Аноним
siya90258

Answer:

Q.8 . circumference of circle =2×pi×r

157cm =2×3.14×r

157cm =6.28×r

157cm/6.28 =r

25cm =radius

Q.9. circumference of circle=2×pi×r

99cm =2×22/7×r

99cm =44/7×r

(99cm×7)/44=r

15.75cm =r

2×15.75cm =diameter

31.5cm=diameter