Sagot :
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1. If two angles are congruent, then they have the same measure. If two angles have the same measure, then they are congruent. If two angles do not have the same measure, then they are not congruent.
2. If two lines intersect to form right angles, then the are perpendicular. If a conditional and its converse are both true, we can write it as a Biconditional using if and only if.
Step-by-step explanation:
Sorry yan lang.
hope it helps.