Question

Proszę o pomoc na wczoraj !!!!!

Answer 1

Odpowiedź:

6.

a)

a = 13 cm

d2 = 24 cm

x = 0.5d2 = 12 cm

y = 0,5 d1

[tex]13^2 = x^2 + y^2\\13^2 = 12^2 + y^2\\169 = 144 + y^2\\y^2 = 169 - 144 = 25 \\ y = 5 cm[/tex]

P =  5 * 24 =  [tex]120 cm^2[/tex]

h - wysokość

h =  [tex]\frac{120}{13}[/tex] cm

b)

a = 6 cm

x = 0,5 d1

y = 0,5d2

x/6 =  1/3               /* 6

x = 6/3 = 2 cm

[tex]6^2 = 2^2 + y^2\\36 = 4 + y^2\\y^2 = 36 - 4 = 32 \\y = \sqrt{32} = \sqrt{2 * 16} = 4\sqrt{2}[/tex] cm

d2 = 2y

P = 2 * [tex]8\sqrt{2} = 16\sqrt{2} cm^2[/tex]        

h = [tex]\frac{16\sqrt{2} }{6} = \frac{8}{3} \sqrt{2} cm[/tex]