Grades 7-8 Video Solutions 2026-2026_7-8

Video Transcription

Video Summary

The video solves problem 16 by adding matching opposite angles and comparing totals. It notes that the four corner triangles together have 720 degrees of angle sum, since each triangle has 180 degrees. The colored angles are shown to equal the angles of a quadrilateral, which total 360 degrees. Subtracting these colored angles from the full triangle totals leaves the gray shaded angles: 720 minus 360 equals 360 degrees. Therefore, the sum of all shaded angles is 360 degrees, so the correct answer is D.

Keywords

geometry

angles

triangles

quadrilateral

angle sum