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Help plz plz plz Pentagon ABCDE is similar to pentagon RSTUV . The perimeter of pentagon ABCDE is 36.8 centimeters. What is the length of ST ? 19.8 cm 18 cm 25.8 cm 15 cm
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Help plz plz plz

Pentagon ABCDE is similar to pentagon RSTUV . The perimeter of pentagon ABCDE is 36.8 centimeters.


What is the length of ST ?

19.8 cm
18 cm
25.8 cm
15 cm

Help plz plz plz Pentagon ABCDE is similar to pentagon RSTUV . The perimeter of pentagon-example-1
User Gaj
by
3.7k points

2 Answers

8 votes

Answer:

Answer is D 15cm

Explanation:

User Cordialgerm
by
3.7k points
6 votes

Answer:

ST = 15 cm

Explanation:

find BC first by adding four other sides and subtracting from 36.8

sum of 4 sides is 30.8, so BC = 6

Now find ST by creating a proportion from corresponding sides:

BC / ST = DE / UV

6 / ST = 13.2 / 33

Cross-multiply:

13.2ST = 198

ST = 198/13.2

ST = 15

User Varda
by
3.3k points
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