P=1/2 ah a) a=5cm h=1 dm =10 cm P=5*10/2 =5*5 =25 cm² b) a= 4 cm h=25 mm =2,5 cm P=4*2,5/2 =2*2,5 =5 cm² c) a=36 cm h=5 dm =50 cm P=36*50/2 =18*50 =900 cm² =9 dm² d) a=3 m h=21 dm =2,1 m P=3*2,1/2 =6,3/2 =3,15 m²
a) a = 5 cm , h = 1 dm = 10 cm P = 1/2 a*h = 1/2 * 5 cm * 10 cm = 1/2 * 50 cm = 25 cm2 b) a = 4 cm , h = 25 mm = 2,5 cm P = 1/2 a * h = 1/2 * 4 cm * 2,5 cm = 1/2 * 10 cm = 5 cm2 c) a = 36 cm , h = 5 dm = 50 cm P = 1/2 a * h = 1/2 * 36 cm * 50 cm = 18 cm * 50 cm = 900 cm2 d) a = 3 m , h = 21 dm = 2,1 m P = 1/2 a * h = 1/2 * 3 m * 2,1 m = 1,5 m * 2,1 m = 3,15 m2 Mam nadzieje że pomogłam :)
