Determine if triangles can be formed with the following side lengths:

1. 4 cm, 7 cm, 10 cm

2. 24 mm, 20 mm, 30 mm

3. 7 ft., 9 ft., 16 ft.

4. 9 in., 13 in., 24 in.

Just say yes or no to each of them

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a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

70

step-by-step explanation: