Question

z rysunku wynika , że
A. 2a +2a +1 +12=30
B.4a + 8 = 30
C.4a + 14 = 30
D.½ (2a+12) × 3 = 30

Answer 1

6+2a+2(a+1)=30

6+2a+2a+2=30

8+4a=30

Odp. B :)