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I = a*b = 2 cm * 6 cm = 12 cm
II = a*a = 2 cm * 2 cm* = 2 cm
PF (pole figury) = 12 cm + 2 cm = 14 cm
B)
I = 1/2 * (a+b)*h = 1/2 *(2cm*2cm)*1 cm = 3 cm
II = 1/2 * (a+b)*h =1/2 * (3 cm *3 cm)*1cm = 5 cm
III = a*b = 1 cm *5 cm = 5 cm
IV = a*b = 1 cm * 6 cm = 6 cm
V = 1/2 *a*h = 1/2 * 2 cm * 6 cm = 6 cm
PF = 2 cm + 4,5 cm +5 cm + 6 cm +6 cm = 23 cm
Czyli: A) 14 cm
B) 23 cm
Wyniki działań oczywiście w cm kwadratowych a jeśli chodzi o mój sposób liczenia to 1 kratka to liczyłam jako 1 cm :)
P2 = 2 · 2 = 4
12 + 4 = 16
b) P1 = = 3
P2 = = 5
P3 = 5 · 1 = 5
P4 = 6 · 1 = 6
P5 = = 4
3 + 5 + 5 + 6 + 4 = 23