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In a right -angled triangle, prove that...

In a right -angled triangle, prove that r+2R=S.

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PATHFINDER-SOLUTION OF TRIANGLE AND HEIGHT AND DISTANCE-QUESTION BANK
  1. Solve the triangle if B =30^@, C=60^@, a =6 cm

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  2. Find the ratio of the sides of a triangle whose interior angles are 30...

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  3. In a right -angled triangle, prove that r+2R=S.

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  4. The ex-radii r1,r2,r3 or Delta ABC are in H.P. Show that its sides a,...

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  5. If the sides of a triangle are in the ratio 5:8:11 and theta denotes ...

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  6. In a triangle of base a, the ratio of the other sides is r(lt1). Show...

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  7. Prove that he distance between the circum-centre and the ortho-centre ...

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  8. If r1 =r2+r3+r, prove that the triangle is right angled.

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  9. If in a DeltaABC, the value of cotA, cotB, cotC are in A.P. show a^2,b...

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  10. The angle of depression of a standing bus at stopped B from the top ...

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  11. The shadow of a pole is 9m long when the angle of elevation of the sun...

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  12. From the foot of a 60m high tower the angle of elevation of a minar is...

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  13. From a point on the horizontal line through the foot of a chimney the ...

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  14. A man stands at a point X on the bank of a river and looks at the top...

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  15. The angular elevations of the top of a tower from two points in the s...

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  16. An observer on the top of a monument 500 m above the sea level, observ...

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  17. An observer on the top of a monument 500 m above the sea level, observ...

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  18. A vertical pillar of height h cm stands on the plane ground. At a fi...

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  19. A post stands on the top of a pillar 40ft high. The elevations of th...

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  20. A man, standing on the bank of a river observes that the angle of elev...

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