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Side BC of a triangle ABC has been produ...

Side BC of a triangle ABC has been produced to a point D such that `angleACD=120^@` . If `angleB=1/2angleA` then `angleA` is equal to

A

`80^@`

B

`60^@`

C

`75^@`

D

`90^@`

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MODERN PUBLICATION-LINES AND ANGLES-EXERCISE
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  3. Side BC of a triangle ABC has been produced to a point D such that ang...

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  4. If the sides of a triangle are produced in order, then the sum of the ...

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  6. In fig. if EC||AB, angleECD=70^@ and angleBOC=20^@ then angleOBD is

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  7. In fig. what is x iin terms of x and y?

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  8. In fig. what is y in terms of x?

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  9. In fig. what is the value of x?

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  10. In fig. if BP||CQ and AC=BC, then the measure of x is

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  11. In figure if AB||CD||EF,PQ||RS, angleRQD=25^@ and angleCQP=60^@ then a...

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  12. Prove that if one angle of a triangle is equal to the sum of the other...

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  13. An exterior angle of a triangle is less than either of its interior op...

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  14. The angles of a triangle are in the ratio 5:3:7. the triangle is

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  15. If one of the angles of a triangles is 130^@, then the angle between t...

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  16. In the given figure POQ is a line. The value of x is

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  17. Angles of a triangle are in the ratio 2:4:1 smallest angle of the tria...

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  18. In fig. PQ||ST=110^@, and angleRST=130^@, find angleQRS

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  19. Which type of angle has measure greater than 180^@ but less than 360^@...

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  20. In the fig. find x and y if x-y=70^@

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