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In a triangle ABC, the measure of angle ...

In a triangle ABC, the measure of angle A is ` 40°` less than the measure of angle B and `50°` less than that of angle C. Find the measure of `∠ A.`

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NCERT EXEMPLAR-TRIANGLES-EXERCISE TRUE OR FALSE
  1. In Fig. 6.31(i) and (ii), find the values of a, b and c.

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  2. In triangle XYZ, the measure of angle X is 30° greater than the measur...

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  3. In a triangle ABC, the measure of angle A is 40° less than the measu...

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  4. I have three sides. One of my angle measures 15°. Another has a measur...

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  5. Jiya walks 6 km due east and then 8 km due north. How far is she from ...

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  6. Jayanti takes shortest route to her home by walking diagonally across ...

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  7. In ∆PQR of Fig. 6.32, PQ = PR. Find the measures of ∠Q and ∠R.

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  8. In Fig. 6.33, find the measures of ∠ x and ∠ y.

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  9. In Fig. 6.34, find the measures of ∠ PON and ∠ NPO

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  10. Find the measure of ∠ A in Fig. 6.36

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  11. In a right-angled triangle if an angle measures 35°, then find the mea...

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  12. Each of the two equal angles of an isosceles triangle is four times th...

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  13. The angles of a triangle are in the ratio 2 : 3 : 5. Find the angles

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  14. If the sides of a triangle are produced in an order, show that the sum...

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  15. In ∆ABC, if ∠A = ∠C, and exterior angle ABX = 140°, then find the angl...

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  16. Find the values of x and y in Fig. 6.37

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  17. Find the value of x in Fig. 6.38

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  18. The angles of a triangle are arranged in descending order of their mag...

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  19. In ∆ ABC, DE || BC (Fig. 6.39). Find the values of x, y and z.

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  20. In Fig. 6.40, find the values of x, y and z.

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