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In DeltaABC, angleA-angleB=16^(@) and an...

In `DeltaABC, angleA-angleB=16^(@) and angleC-angleA=34^(@)=34^(@)` , find all angles of the triangle

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To find the angles of triangle ABC given that \( \angle A - \angle B = 16^\circ \) and \( \angle C - \angle A = 34^\circ \), we can follow these steps: ### Step 1: Set up the equations We know that the sum of the angles in a triangle is \( 180^\circ \). Therefore, we can write: \[ \angle A + \angle B + \angle C = 180^\circ \] ### Step 2: Express angle C in terms of angle A From the second condition \( \angle C - \angle A = 34^\circ \), we can express \( \angle C \) as: \[ \angle C = \angle A + 34^\circ \] ### Step 3: Substitute angle C into the sum of angles equation Now, substitute \( \angle C \) in the sum of angles equation: \[ \angle A + \angle B + (\angle A + 34^\circ) = 180^\circ \] This simplifies to: \[ 2\angle A + \angle B + 34^\circ = 180^\circ \] ### Step 4: Rearrange the equation Rearranging gives us: \[ 2\angle A + \angle B = 180^\circ - 34^\circ \] \[ 2\angle A + \angle B = 146^\circ \] ### Step 5: Use the first condition From the first condition \( \angle A - \angle B = 16^\circ \), we can express \( \angle B \) in terms of \( \angle A \): \[ \angle B = \angle A - 16^\circ \] ### Step 6: Substitute angle B into the rearranged equation Substituting \( \angle B \) into the equation \( 2\angle A + \angle B = 146^\circ \): \[ 2\angle A + (\angle A - 16^\circ) = 146^\circ \] This simplifies to: \[ 3\angle A - 16^\circ = 146^\circ \] ### Step 7: Solve for angle A Adding \( 16^\circ \) to both sides gives: \[ 3\angle A = 162^\circ \] Dividing by 3: \[ \angle A = 54^\circ \] ### Step 8: Find angle B Now substitute \( \angle A \) back into the equation for \( \angle B \): \[ \angle B = 54^\circ - 16^\circ = 38^\circ \] ### Step 9: Find angle C Finally, substitute \( \angle A \) into the equation for \( \angle C \): \[ \angle C = 54^\circ + 34^\circ = 88^\circ \] ### Conclusion Thus, the angles of triangle ABC are: \[ \angle A = 54^\circ, \quad \angle B = 38^\circ, \quad \angle C = 88^\circ \]
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NAGEEN PRAKASHAN ENGLISH-LINES AND ANGLES-Exercise 6 C
  1. Angles of a triangle are (3x)^(@),(2x-7) and (4x-11)^(@) . Find the me...

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  2. Prove that measure of each angle of an equilateral triangle is 60^0...

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  3. Find the x and y from the adjooining figure.

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  4. In a DeltaABC, angleA=2 angleB=3 angleC, find each of the triangle.

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  5. In DeltaABC, angleA=x+15^(@),angleB=x and angleC=2x-35^(@) find, each ...

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  6. In DeltaABC, bisectors of angleB and angleC interesct each other at po...

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  7. An angle of a triangle mesures 68^(@) and the other two angles differ ...

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  8. Find the value of x form the adjoining diagram.

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  9. In DeltaABC sides AB and C are produced to D and E respectively. Bisec...

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  10. In triangle ABC,the bisector of interior angle A and the bisector angl...

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  11. From the adjoining figure prove that angleA+angleB+angleC+angleD+angle...

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  12. The side BC of DeltaABC is product to N. bisector of angle meets BC at...

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  13. Bisectors of angles A and B of a parallelogram ABCD meet at point M. P...

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  14. Prove that bisectors of any two adjacent angles of a rhombus form a ri...

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  15. Triangle ABC is right angles at B. Internet bisectors of acute angles ...

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  16. Bisectors of angles A and D of a quadrilateral ABCD meet at P. Prove t...

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  17. In the given figure, AD is altitude and AE is bisector of angle BAC of...

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  18. In DeltaABC, angleA-angleB=16^(@) and angleC-angleA=34^(@)=34^(@) , fi...

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  19. In a right angled triangle ABC, angleB=90^(@), p is a point on BA prod...

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  20. In the adjoining figure, AB||CD. If the angleBAE=25^(@) and angleCDE=...

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