Question

Jaka jest długość boku kwadratu o polu a 25cm b 49cm c 9 dm] d 64cm

Answer 1

P=a²

 

a)

P=25cm²

a²=25

a=5[cm]

 

b)

P=49cm²

a²=49

a=7[cm]

 

c)

P=9 dm²

a²=9

a=3[dm]

 

d)

P=64cm²

a²=64

a=8[cm]

Answer 2

a)

P = 25 cm^2

P = a^2 = a*a

zatem

a*a = 25 cm^2 = 5 cm* 5 cm

a = 5 cm

===========

b)

P = 49 cm^2

P = a*a = 49 cm^2

a*a = 7 cm * 7 cm

a = 7 cm

===============

c)

P = 9 dm^2

a*a = 9 dm^2 = 3 dm * 3 dm

a = 3 dm

=============

d)

P = 64 cm^2

a*a = 64 cm^2 = 8 cm * 8 cm

a = 8 cm

=============