![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
The word “twice” indicates multiplication by 2.
\ \The word “sum” indicates the symbol “ + ”.
\The word twice the sum of two adjacent sides a and b indicates 2(a+b).![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
Rewrite the sentence into expression as![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=039ec7d295ba3618e8ba0350f418382b.png\")
![\"\"](\"/userfiles/image/Library/parllelogram_pa74_p25.gif\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The perimeter of a parallelogram is p = 2(a + b).
\