Odpowiedź:
Zad. 33
1. a = 8 cm
b = 10 cm
h = 6 cm
P = (a + b) × h/2
P = (8 + 10) × 6/2
P = 18 × 6/2
P = 54 cm2
2. a = 23 cm
b = 27 cm
h = 14 cm
P = (a + b) × h/2
P = (23 + 27) × 14/2
P = 700/2
P = 350 cm2
3. a = 4 dm
b = 6 dm
h = 3 dm
P = (a + b) × h/2
P = (4 dm + 6 dm) × 3 dm/2
P = 30/2
P = 15 dm2
Zad. 34
1. a = 14 cm
b = 23 cm
h = 14 cm
P = (a + b) × h/2
P = (14 + 23) × 14/2
P = 37 × 14/2
P = 518/2
P = 264 cm2
2.
Figura nr. 1 - trapez
a = 12 cm
b = 15 cm
h = 10 cm
P = (a + b) × h/2
P = (12 + 15) × 10/2
P = 270/2
P = 135 cm2
Figura nr. 2 - prostokąt
a = 10 cm
b = 15 cm
P = a × b
P = 10 × 15
P = 150 cm2
Końcowe pole figury:
135 cm2 + 150 cm2 = 285 cm2
3.
Figura nr. 1 - trójkąt
a = 16 cm
h = 9 cm
P = a × h/2
P = 16 × 9/2
P = 144/2
P = 72 cm2
Figura nr. 2 - prostokąt
a = 16 cm
b = 10 cm
P = a × b
P = 16 × 10
P = 160 cm2
Końcowe pole figury:
72 cm2 + 160 cm2 = 232 cm2
Szczegółowe wyjaśnienie:
/ - dzielenie
× - mnożenie
P - pole
Mam nadzieję, że pomogłam <3
