Question

question 1 of 10 which of the following are necessary when proving rectangle are congruent? check all that apply. a. all right angles are congruent. b. all obtuse angles are congruent. c. opposite sides are perpendicular. d. opposite sides are congruent.

Explanation:

In rectangle - congruence proofs, right - angle congruence (A) helps as rectangles have right angles, and opposite - side congruence (D) is a key property of rectangles. Obtuse angles are not relevant to rectangles (B is incorrect), and opposite sides of a rectangle are parallel, not perpendicular (C is incorrect).

Answer:

A. All right angles are congruent., D. Opposite sides are congruent.