Question

the area of a square is 81sq.ft,then what is the side of such a square​

Answer 1

Answer:

a) In ΔADP and ΔDCQ

AD = DC (Sides of a square are equal)

∠ADP = ∠DCQ = 900

AP = DQ (Given)

∴Using RHS congruency rule, ΔADPΔDCQ

⇒∠DAP = CDQ or ∠1 = ∠3.....(1)

b) ∠DMP = ∠1 + ∠2 (Exterior angle property)

= ∠3 + ∠2 (From (1))

= ∠ADP  

= 900

Hence, proved.

Step-by-step explanation:

Answer 2

Answer:

81×4 ÷ 4

Step-by-step explanation:

first it is a feat so multiply it by 4 and then divide it by 4