Grades 9-10 Video Solutions 2021-video 2021 9-10/8

Video Transcription

Video Summary

The video explains how to find the perimeter of rectangle ABCD within a larger rectangle that has a given total perimeter of 30 cm. The larger rectangle is divided by one vertical and one horizontal line, forming four parts, including a smaller square with an area of 9 cm². The side length of the square is 3 cm. Using the perimeter formula, the problem breaks down the perimeter equation to solve for the smaller rectangle ABCD's perimeter, which consists of segments labeled B and C. By substitution, it concludes that the perimeter of rectangle ABCD is 18 cm.

Keywords

perimeter

rectangle

geometry

mathematics

calculation