21. The altitude of an equilateral triangle of side 2/√3cm is :
  A.  1 m
  B.  1 m
  C.  1 m
  D.  1 m
     
   
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22. ABC is an equilateral triangle.Points D,E,F are taken in sides AB,BC,CA respectively,so that closed a triangle which is :
  A.  Equilateral triangle
  B.  Equilateral triangle
  C.  Equilateral triangle
  D.  Equilateral triangle
     
   
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23. The centroid of an equilateral triangle ABC is G.If AB is 6 cms, the length of AG is
  A.  2√3
  B.  2√3
  C.  2√3
  D.  2√3
     
   
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24. In △ABC,the line parallel to BC intersects AB and AC at P and Q respectively.If AB:AP = 5:3, then AQ:QC is:
  A.  3:2
  B.  3:2
  C.  3:2
  D.  3:2
     
   
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25. If one angle of a triangle is equial to half the sum of the other two equal angles,then the triangle is:
  A.  Equilateral
  B.  Equilateral
  C.  Equilateral
  D.  Equilateral
     
   
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26. G is the centroid of the equilateral triangle ABC.If AB = 9cm, then AG is equal to
  A.  3√3cm
  B.  3√3cm
  C.  3√3cm
  D.  3√3cm
     
   
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27. The length of the sides of a triangle are a,b,c respectively. If a2+b2+c2 = ab+bc+ca,then the triangle is
  A.  Equilateral
  B.  Equilateral
  C.  Equilateral
  D.  Equilateral
     
   
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28. PQR is an equilateral triangle.MN is drawn parallel to QR such that M is on PQ and N is on PR. If PN = 6 cm, then the length of MN is
  A.  6cm
  B.  6cm
  C.  6cm
  D.  6cm
     
   
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29. If triangle ABC is an isosceles triangle with angle C = 90degree and AC = 5 cm,then AB is: .
  A.  5√2 cm
  B.  5√2 cm
  C.  5√2 cm
  D.  5√2 cm
     
   
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30. ABC is an isosceles triangle such that AB=AC and &angleB= 35°.AD is the median to the base BC. Then ∠BAD is:
  A.  55°
  B.  55°
  C.  55°
  D.  55°
     
   
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