Triangle Formulas

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 Triangle Review:   Fundamentals of Triangle ,  Formula’s for Triangle , Types of Triangle , 45° – 45° – 90° Triangle , 30° – 60° – 90° Triangle , Congruent Triangles, Similar Triangles

Class Questions:   Practice Examples 1,   Practice Examples 2

Practice Questions :   Exercise 1, Exercise 2, Exercise 3 ,  Exercise 4

                                                                  

Triangle Formulas

  • Perimeter of Triangle =  L1   +  L2   +    L3  ; where  L1,  L2, &  L3   are lengths of sides of triangle.
  • Area of Triangle      =     ½  x  base  x  height.
                                                      =   ½  bh ;  where b = base  and h = height
  • Very Important thing to  remember is that base and height has to be perpendicular to each other for any shape of triangle while calculating the area of triangle. Any side can be considered as  a base of  the triangle.
Study following different shapes  of triangle while calculating  the area of the triangle.

tri-5

Δ ABC ; AB = Height ‘h’  and BC = Base ‘b’
Δ XYZ ; OX = Height ‘h’  and YZ  = Base ‘b’
Δ PQR ; OP = Height ‘h’ and QR = Base ‘b’

tri-6

Δ LMN ; MO = Height ‘h’ and LN = Base ‘b’
Δ DEF ;   EO =  Height ‘h’  and DF = Base ‘b’
  • Sum of three interior angles of triangle =  x° + y° +  z°  = 180°. Where x, y and z are interior angels or triangle.

                                                                                                                                                       

Tutorials  – Triangle

 Triangle Review:   Fundamentals of Triangle ,  Formula’s for Triangle , Types of Triangle , 45° – 45° – 90° Triangle , 30° – 60° – 90° Triangle , Congruent Triangles, Similar Triangles

Class Questions:   Practice Examples 1,   Practice Examples 2

Practice Questions :   Exercise 1, Exercise 2, Exercise 3 ,  Exercise 4

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