Basic Geometrical Ideas

30. The number of lines passing through five points such that no three of them are collinear is

  • (A) 10
  • (B) 5 
  • (C) 20         
  • (D) 8

29. What is the measure of the smaller angle formed by the hour and the minute hands of a clock at 7 O’clock?

  • (A) 120°      
  • (B) 130°      
  • (C) 150°      
  • (D) 180°

28. A pair of opposite sides of a trapezium are

  • (A) Parallel 
  • (B) Intersecting    
  • (C) Perpendicular 
  • (D) None of these

27. In the given figure, PQRQ, PQ = 5 cm and QR = 5 cm. Then ∆PQR is

  • (A) a right triangle but not isosceles
  • (B) an isosceles right triangle
  • (C) isosceles but not a right triangle
  • (D) neither isosceles nor right triangle

26. In the following figure, what is AE + EC?

  • (A) BD        
  • (B) CD        
  • (C) AB        
  • (D) AC

25. In the following figure, what is ACEC?

  • (A) BC        
  • (B) BD        
  • (C) AE        
  • (D) AC

24. In the following figure, what is BDBE?

  • (A) BD        
  • (B) ED        
  • (C) AE        
  • (D) EC

23. In the following figure, what is BDDE?

  • (A) BE        
  • (B) CD        
  • (C) AB        
  • (D) EC

22. An angle is said to be trisected if it is divided into three equal parts.  If in the following figure, ∠BAC = ∠CAD = ∠DAE, how many trisectors are there for ∠BAE?

  • (A) 1 
  • (B) 2 
  • (C) 3 
  • (D) 4

21. Find out the incorrect statement, if any, in the following:

An angle is formed when we have

(i) two rays with a common end-point

(ii) two line segments with a common end-point

(iii) a ray and a line segment with a common end-point

  • (A) (i)
  • (B) (ii)         
  • (C) (iii)        
  • (D) (i) and (ii)

20. Which of the following relation is true?

  • (A) ∠ABC = ∠CBD + ∠ABD      
  • (B) ∠ABC ⎼ ∠CBD = ∠ABD      
  • (C) ∠ABC = ∠CBD ⎼ ∠ABD
  • (D) ∠ABC + ∠CBD = ∠ABD

19. What is the name of the angle ∠1 + ∠2 in the following figure?

  • (A) ∠EBD    
  • (B) ∠DBC   
  • (C) ∠EBC
  • (D) ∠ABC

18. What is the name of the angle ∠1 + ∠2 + ∠3 in the following figure?

  • (A) ∠EBD    
  • (B) ∠DBC   
  • (C) ∠EBC
  • (D) ∠ABC

17. What is the name of the angle ∠CBA ⎼ ∠1 in the following figure?

  • (A) ∠ABE    
  • (B) ∠EBD    
  • (C) ∠EBC
  • (D) ∠ABD

16. In the following figure, how many angles less than 180° are there?

  • (A) 21
  • (B) 20         
  • (C) 13         
  • (D) 15

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