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Sergeu [11.5K]
3 years ago
11

please help will give BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLI

EST BRAINLIEST BRAINLIEST for correct answer!!!!!!!!!!!!!

Mathematics
2 answers:
Lunna [17]3 years ago
5 0

Answer:

20

Step-by-step explanation:

Since both triangles are similar, then the ratio is 18:6, which is 3:1

Triangle ABC is 3 times the size of DEC.

So, 1/3 of 30 is 10, and 30-10 is 20.

leonid [27]3 years ago
4 0
20

it just is i did the math but i’m terrible at explaining
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