Page 60 - WCS - Electrical
P. 60

WORKSHOP CALCULATION & SCIENCE - CITS


















           Area of triangle =  S(S x2  − a)(S − b)(S − c) unit²
           where
                 a,b,c are sides of triangle
                                       a    b   +  c   +
                 s = Semi perimeter =        unit
                                       2

           v  Right angled triangle
           In this triangle, angle between one of two adjacent sides is 900. Right angle means ninety degrees. That’s why
           right angled triangle means, one of the angles of this triangle is definitely ninety degrees.
















           Area of right angled triangle
                                         1
                                       =    x   x Base x Height
                                            bh
                                         2
                                         1
                                           bh
                                       =  x   bh unit²
                                         2

           Hypotenuse                  =   Base 2  + Height  2
           Where hypotenuse means, the diagonal or largest length of the side of right angled triangle.
           Examples


           1  Calculate its area if the base and height of a Right angled triangle are 10 cm and 3.5 cm respectively.
                                         Base (b)            = 10 cm
                                         Height (h)          = 3.5 cm
                                         Area (A)            = ?
                                                               1
                                                                  bh
                                                      A      =  x    x b x h
                                                               2
                                                                1
                                                             =    x   x 10 x 3.5
                                                                   bh
                                                                2
                                                             = 17.5 cm²





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                                            CITS : WCS - Electrical - Exercise 5
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