Answer:
24
Step-by-step explanation:
B
The diagonals of a rectangle are congruent, thus
DB = AC = 48
The diagonals also bisect each other, thus
DE = 0.5DB = 0.5 × 48 = 24 → B
x+3x+3x=21
7x=21
x=3
3, 9, 9=21
the answers are 3, 9, and 9
B.
16 x 12 = 192
