Instructional Video
Khan Academy

Khan Academy: Geometry: Finding Area Using Similarity and Congruence

9th - 10th Standards
Explains how to determine the area of a pentagonal shaded region in a triangle. The triangle that is broken into multiple similar and congruent triangles. [10:07]
Instructional Video
Khan Academy

Khan Academy: Triangles: Finding Area Using Similarity and Congruence

9th - 10th Standards
Explains how to determine the area of a pentagonal shaded region in a triangle. The triangle that is broken into multiple similar and congruent triangles.