Question

plz solve it correctly​

Answer 1

Answer:

8.84

Step-by-step explanation:

area of square = a²

a²=441=21×21

a= 21

perimeter of square = 4a = 4×21

= 84cm

Answer 2

8. 84m

9. The angles are 45⁰, 90⁰, 45⁰.

Please check out the pics for detailed explanations.

idk what you need for the 9th question, if it's about the remaining two angles your answer is here. if you need something else pls drop a comment and I'll be editing it