Answer:
C is the answer.
w= width
l = 3w
P = 2(l+w)
substitute
24 = 2(3w+w)
24 = 2(4w)
24 =8w
3 =w
The width is 3 inches
the length is 9 inches
C
Step-by-step explanation:
70+20=90 and thats a right angle which is 90°
23