IM 6.1.9 Lesson: Formula for the Area of a Triangle - Activity 3

For each triangle, circle a base measurement that you can use to find the area of the triangle.
Now, find the area of any three triangles. Show your reasoning.
– Suzanne Colbert, GeoGebra Classroom Activities, IM 6 – 8 Math

Information: IM 6.1.9 Lesson: Formula for the Area of a Triangle - Activity 3