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Is it possible to form a triangle with a...

Is it possible to form a triangle with angles of the following measures ?
(i) `25^(@), 65^(@), 90^(@)`
(ii) `50^(@), 120^(@), 30^(@)`
(iii) `130^(@), 40^(@), 10^(@)`
(iv) `70^(@), 70^(@), 50^(@)`
(v) `30^(@), 90^(@), 90^(@)`
(vi) `60^(@), 50^(@), 60^(@)`

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ICSE-PROPERTIES OF TRIANGLES-Exercise 18A
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  2. Is it possible to form a triangle with angles of the following measure...

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  3. In a DeltaABC, if /A=72^(@) and /B=65^(@), find the measure of /C.

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  4. In a DeltaPQR, if /P=90^(@) and /Q=/R, find the measures of each of th...

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  5. The angles of a triangle are in the ratio 3:5:4. Find the measure of ...

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  6. One of a angle triangle measures 30^(@) and the other two angles are i...

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  7. In a right-angled triangle, the two acute angles are in the ratio 4:5....

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  8. One of the two equal angles of an isosceles triangle measures 65^(@). ...

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  9. Find the measures of each of the two equal angles of an isosceles righ...

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  10. If all three angles of a triangle are of the same measure, find the me...

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  11. In a right-angled triangle if one of the acute angles ,measures 40^(@)...

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  12. Find the unknown angles marked in each of the following figures :

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  13. In each of the following figures, one side of a triangle has been prod...

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  14. Calculate the size of each lettered angle in the following figures :

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  15. Use the given figure to express : (i) a in terms of b and f, (ii) ...

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  16. (i) In the given figure, DeltaABC is an isosceles triangle in which AB...

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  17. In the given figure, AB||CD. The line segments BC and AD intersect at ...

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  18. Each base angle of an isosceles triangle is 15^(@) more than its verti...

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  19. The vertical angle of an isosceles triangle is twice the sum if its ba...

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  20. In an isosceles triangle, each base angle is four times its vertical a...

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