AE || BC and D is the mid-point of BC. If area △ABC = 84 cm2, what is area of △BDE?
If we draw EC, we can see that △ABC and △BEC will have equal area. Because triangles on same base and between same parallels are equal in area. Base length (△ABC) = 2 × Base length (△BDE) (∵ D is the mid point) |