In quadrilateral abdc, ab ∥ cd. which additional piece of information is needed to determine that abdc is a parallelogram? ab ≅ cd ac ≅ bd ab ⊥ bd cd ⊥ bd

The answer is B AC ≅ BD Since you already know that ab ll cd, all you need to know is that ac is bd

B. AC ≅ BD

Step-by-step explanation:

Since the definition of a parallelogram literally says that it's a quadrilateral with 2 parallel sides, we have AB || CD so the 2 other sides (AC and BD) need to be either similar or parallel (either works, due to that if they're similar we can prove that since AB || CD that they're parallel).

three-fourths of an hour

36÷48=0.75

0.75=

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐