Answer:
8
Step-by-step explanation:
AC and BC are the same, so both equal 6
6+6 is 12
Subtract 12 from 20
20-12=8
CD is 8
Answer:
D. 3 and 116
Step-by-step explanation:
d.f.N = k - 1 (numerator degrees of freedom) = 4 - 1 = 3
N = 4 × 30 = 120
d.f.D = N - k (denominator degrees of freedom) = 120 - 4 =116
Total of area of faces so (20*6+20*4+4*6)*2=448 cm ^2
