Grades 11-12 Video Solutions 2021-video 2021 11-12/15

Video Transcription

Video Summary

The problem involves finding the perimeter of a large triangle divided into smaller triangles, each marked with its perimeter. To determine the large triangle's perimeter, the perimeters of the blue triangles are summed, but this results in counting the shared edges (the red triangles) twice. To correct this, the perimeter of the red triangles is subtracted from the total perimeter of the blue ones. This calculation leads to a final perimeter of 34 for the large triangle. The correct answer is 34, option C.

Keywords

triangle perimeter

large triangle

blue triangles

red triangles

perimeter calculation