What is always true about vertical angles? A. Vertical angles are equal in measure.
B. Vertical angles combine to form a straight angle.
C. The sum of vertical angles is always 180° O D. The sum of vertical angles is always 90°​

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?