Question

ex 8,dau coroană,va rog ajutati-ma!!!​

Answer 1

Răspuns:

Explicație pas cu pas:

C = 2B/3

D = B/6

A = 5C/4 = 5/4*2B/3 = 10B/12 = 5B/6

A + B + C + D = 360°

5B/6 + B + 2B/3 + B/6 = 360°

5B/6 + 6B/6 + 4B/6 + B/6 = 360°

16B/6 = 360°

B = 6*360°/16 = 135°

A = 5*135°/6 = 112,5° = 112°30'

C = 2*135°/3 = 90°

D = 135°/6 = 22,5° = 22°30'