Answer
Options B, C and D represent sets of measurements that could be for the sides of Allie's triangle garden.
Step-by-step explanation
If the three sides in a triangle are a, b and c with c being the longest side.
But, it should be noted that if the longest side is equal to or more than the sum of the two sides, c ≥ a + b, the triangle is not possible.
Option A
1 in, 5 in and 6 in
a = 1 in
b = 5 in
c = 6 in
a + b = 1 + 5 = 6
6 = 6
c = a + b
Hence, this set of sides is not possible.
Option B
6 m, 8 m and 10m
a = 6 m
b = 8 m
c = 10 m
a + b = 6 + 8 = 14 m
c = 10 m
10 < 14
c < a + b
This set of sides form a possible triangle
Option C
9 cm, 9 cm and 9 cm
a = 9 cm
b = 9 cm
c = 9 cm
a + b = 9 + 9 = 18 cm
c = 9 cm
9 < 18
c < a + b
This set of sides form a possible triangle
Option D
3ft, 3 ft and 4 ft
a = 3 ft
b = 3 ft
c = 4 ft
a + b = 3 + 3 = 6 ft
c = 4 ft
4 < 5
c < a + b
This set of sides form a possible triangle
Hope this Helps!!!