Which of the following statements must be true about a rectangle? choose all answers that apply: choose all answers that apply: a it has four sides of equal length. b it has four right angles. c it has two pairs of parallel opposite sides.

The correct answers are options B and C.                            

Step-by-step explanation:                      

B It has four right angles.

C It has two pairs of parallel opposite sides.

All angles are right angles by definition of a rectangle. The rectangle has 2 pairs of parallel opposite sides.              

Option A is wrong as its a square whose all 4 sides have equal length.