Answer:
Scale and proportion are both design elements that have to do with size. Scale is the size of one object in relation to the other objects in a design or artwork. Proportion refers to the size of the parts of an object in relationship to other parts of the same object.
Explanation:
The Colors Orange, Violet, and green are equally Spaced from each other on the Color Wheel, they are called (secondary) colors.
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There were actually several building techniques that were introduced by the Romans, but perhaps the most important was the bridge building technique that allowed bridges to be built without supports.