Which biconditional statement is valid? A quadrilateral is a square if and only if its diagonals bisect each vertex . Two polygons are congruent if and only if all corresponding parts are congruent . A quadrilateral is a rectangle if and only if its diagonals bisect each other.

answer: (3,11) is your answer.

20days louise can read300 pg

step-by-step explanation:

1 day 15 pg 300: 15= 20

x day 300 pg

m∠abd = m∠dbc

step-by-step explanation:

given : ab bisects ∠dbc

as we know that bisection means ab divides   ∠dbc   in two equal angles named as   ∠dba and   ∠abc

so, m∠abd = m∠dbc  

because ab bisects ∠dbc.

hence , the first statement m∠abd = m∠dbc is true.