in triangle abc, d and e are the mid points of sides AB and AC. if BC= 8.4 cm then find DE
Answers
Answer:I have tried to solve .. may this will help you
Step-by-step explanation:
In ΔABC
since D and E are mid points of AB and AC respectively.
therefore, DE║ BC [By Thale's Theorem/Basic proportionality Theorem]
so, ∠ADE =∠ABC and ∠AED =∠ACB [ Corresponding Angles]
In Δ ADE and ΔABC
∠ADE =∠ABC
∠AED =∠ACB
By AA criteria for similarity of triangles Δ ADE and ΔABC are similar triangles.
So,
1/2 = DE/8.4
DE = 8.4/2 = 4.2 cm
Answer:
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Homework for Ch- Sentences. ( Do these questions in your classwork copy. )
• State whether the following sentences are declarative, interrogative, imperative
or exclamatory.
1.How well she sings!
2. What is your name?
3. Did I say anything to make you angry?
4. What is your name?
5. Who told you this?
6. She is a successful writer.
7. It is raining cats and dogs.
8. I want to become a writer.
9. She does not eat meat or fish.
10. Go at once.
11. Bring me that file.
12. My mother makes delicious cookies.
13. Get lost.
14. Fetch me a glass of water.
15. Please be seated.
16. Sit down.
17. She writes with her left hand.
18. What a tragedy!
19. How beautiful she is!
20. I have two sisters.
21. How ridiculous this is!
22. I have lost my way.
*****************************************************************
Homework for Ch- Transitive and Intransitive Verbs.
I. Underline the verb in the following sentences and state whether it’s
transitive or intransitive. Also circle ⭕ the direct object.
1. She was crying all day long.
2. We showed her the photo album.
3. The doctor advised me to exercise regularly.
4. It was raining at that time.
5. She laughed at the joke.
6. She gave a cookie to the child.
7. They slept in the street.
8. I ate the cherries.