Traditional Culture Encyclopedia - Photography major - Mathematical photography model of junior high school

Mathematical photography model of junior high school

Solution:

Extend AD to e, make DE=AD, connect BE, CE

The quadrilateral ABEC is a parallelogram.

Because AB=4, BE=AC=3, AE=5.

So Abe = 90.

So the quadrilateral ABEC is a rectangle

So BC=AE=5