What is the formula for the area of a triangle,regular pentagon amd square?????????????

Asked by bhavi | 28th Feb, 2015, 01:21: PM

Expert Answer:

C o n s i d e r space t h e space f o l l o w i n g space f i g u r e.
A r e a space o f space t h e space t r i a n g l e space A B C equals 1 half cross times b a s e cross times h e i g h t equals 1 half cross times B C cross times A D A r e a space o f space t h e space s q u a r e space A B C D equals s i d e cross times s i d e equals A B squared space left square bracket sin c e space t h e space s i d e s space o f space a space s q u a r e space a r e space e q u a l right square bracket A r e a space o f space t h e space r e g u l a r space p e n t a g o n space A B C D E equals 1 half cross times P cross times a comma space w h e r e space P space i s space t h e space p e r i m e t e r space o f space t h e space p e n t a g o n comma a space i s space t h e space a p o t h e m space o f space t h e space l e n g t h space o f space t h e space s e g m e n t space f r o m space t h e space c e n t r e space o f space t h e space p e n t a g o n space t o space t h e space s i d e space o f t h e space p e n t a g o n space p e r p e n d i c u l a r l y.

Answered by Vimala Ramamurthy | 28th Feb, 2015, 07:11: PM