CLASS 7 - MATHS - CH 6 - TRIANGLE AND ITS PROPERTIES

        Q.1 : Write six elements (i.e: 3 sides and 3 angles) of △ ABC ?

        Ans: Three sides of △ABC : AB , BC , CA

                 Three angles of △ABC : ∠ABC , ∠BCA , ∠BAC

        Q.2 :   Write the 

        

         (i) Side opposite to vertex Q of △PQR

        

         Ans : PR

         (ii) Angle opposite to the side LM of △LMN

         Ans: ∠N

         (iii) Vertex opposite to side RT of △RST

         Ans : RS

         Q.3 : What is median ?   

  

         Ans : A Median connects a vertex of a triangle to the mid point of 

         the opposite side.

         Q.4 : How many medians a triangle have ? 

         Ans : 3 

  

         Q.5: Name the triangle in which all the three sides of equal length ?

         Ans : Equilateral triangle

         Q.6: Name the triangle in which two sides are of equal length ?

         Ans : Isosceles triangle

         Q.7 :  In △PQR , D is mid point of QR 

           (i)   PM is _________

                  (ii)  PD is __________

                  (iii) Is QM = MR ?

         
          Ans : (i) PM is altitude

                   (ii) PD is median

                   (iii) No

          Q.8 : Find the value of x in this figure ?
                  
         
          (a) 65⁰  

          (b) 45⁰  
  
          (c) 60⁰ 
   
          (d)  None of these

          
          Q.9: One of the angles of triangle is 80^o and other two angles are 
          equal . Find the measure of other of each of two angles 

          Ans : 50^o , 50^o

          Q.10 : An _____________ of a triangle is equal to the sum of its 
           interior opposite angles . 

 
          Ans : Exterior angle