Question

Zad 1 str 80

Oblicz pole kwadratu o boku:

a) 23 cm

b) 2,5 dm

c) 10,7 m

d) 8 1/4 cm

Answer 1

P=a*a

 

23*23=529cm^2

2,5*2,5=6,25dm^2

10,7*10,7=114,49m^2

8 1/4*8 1/4=68,0625cm^2

Answer 2

a) 23 cm

P= a^2

23^2 = 23cm*23cm = 529 cm^2

 

b) 2,5 dm

2,5^2 = 2,5dm*2,5dm = 6,25 dm^2

 

c) 10,7 m

10^2 = 10,7m*10,7m = 114,49 m^2

 

d) 8 1/4 cm = 8,25 cm

(8,25)^2 = 8,25cm*8,25cm = 68,0625 cm^2