What are the equivalence relation in the set {a, b, c, d} that define the pairs (a, b) and (CD)?

Write the converse of the following statement: if the trees have no leaves, then it is fall. if the trees have no leaves, then it is fall. the trees have no leaves, therefore it is fall. it is fall since the trees have no leaves. if it is fall, then the trees have no leaves.

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab