Example solution: Example of a computed construction: Regular hexagon by the side. Following figures describes step by step construction. Each step is on one row, and contains current progress on the left and the Mask R-CNN prediction for a new step on the right. The red denotes the current state of the construction, the green color denotes the remaining goal and the blue color denotes new circle/line that will be constructed based on the detection. Other colors mark prediction masks, bounding boxes, classes and scores for each detected object.
a) Level definition and first input for the network. Construct a regular hexagon given by the side. The green color denotes the goal and the red denotes the current state of the construction.	b) Prediction of the network. Based on this prediction, a circle will be constructed.
c) Step 1.	d) Prediction for step 2. Based on this prediction, a line will be constructed.
e) Step 2.	f) Prediction for step 3. Based on this prediction, a line will be constructed.
g) Step 3.	h) Prediction for step 4. Based on this prediction, an angle bisector will be constructed. Note that there is an extra detection of parallel through point. Later in construction score of this prediction will increase and the prediction will be used.
i) Step 4. The parallel line constructed part of the goal.	j) Prediction for step 5. Based on this prediction, a parallel line will be constructed.
k) Step 5. The parallel line constructed another part of the goal.	l) Prediction for step 5. Based on this prediction, a parallel line will be constructed.
m) Step 6. The perpendicular bisector constructed another part of the goal	n) Prediction for step 5. Based on this prediction, a perpendicular bisector will be constructed.
o) Step 7 - level successfully finished, the whole goal has been constructed.

J. Macke, J. Sedlář, M. Olšák, J. Urban, J. Sivic. Learning to solve geometric construction problems from images

@inproceedings{geometry_reasoning2021,
    title={Learning to solve geometric construction problems from images},
    author={J. Macke and J. Sedlar and M. Olsak and J. Urban and J. Sivic},
    year={2021}

}