*त्रिकोणABC मध्ये , DE || AB. जर CD = 3 से मी, EC = 4 से मी, BE = 6 से मी, तर DA= …………….*
1️⃣ 7.5 सेमी
2️⃣ 3 सेमी
3️⃣ 4.5 सेमी
4️⃣ 6 सेमी
Answers
Answered by
2
Answer:
4.5cm
Step-by-step explanation:
HERE IS YOUR ANSWER
- Draw triangle ABC.
- then draw DE parallel to AB.
- mark the measurements which is given.
- consider DA=x
- we know that CD/AD=CE/BE
- therefore 3/x=4/6
- x=4.5cm
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Answered by
2
Given : त्रिकोणABC मध्ये , DE || AB.
CD = 3 से मी, EC = 4 से मी, BE = 6 से मी,
To Find : DA
1️⃣ 7.5 सेमी
2️⃣ 3 सेमी
3️⃣ 4.5 सेमी
4️⃣ 6 सेमी
Solution:
Thales's theorem :
If a straight line is drawn parallel to a side of a triangle, then it divides the other two sides proportionately.
Its also called BPT : Basic proportionality theorem.
DE || AB.
=> CD/DA = EC/ BE
=> 3/DA = 4/6
=> DA = 3 x 6 / 4
=> DA = 18/4
=> DA = 9/2
=> DA = 4.5
DA = 4.5 सेमी
Option 3 is correct.
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