Question

in a dilation, the angles of the figure remain
in map making, dilations are used to large geographical areas to fit onto smaller maps.
architects use dilations to create models of buildings for planning and visualization.
medical imaging uses dilations to images for better analysis and diagnosis.

Explanation:

1. In a dilation, the angles of a figure remain unchanged because dilation is a transformation that changes the size but not the shape in terms of angle - measures.
2. In map - making, dilations are used to scale down large geographical areas to fit onto smaller maps. This is a reduction dilation.
3. Architects use dilations to create scale models of buildings for planning and visualization. They can either scale up or scale down depending on the need.
4. Medical imaging uses dilations to enlarge images for better analysis and diagnosis. This helps in seeing details more clearly.

Answer:

1. unchanged
2. scale down
3. scale
4. enlarge