The proof that δabc ≅ δcda is shown.

given: ∥ line segment a b is parallel to line segment c d and line segment b c is parallel to line segment d a ∥

prove: δabc ≅ δcda

what is the missing reason in the proof?

perpendicular bisector theorem

pythagorean theorem

hl theorem

sss congruence theorem

perpendicular bisector theorem

A Perpendicular bisector theorem

Step-by-step explanation:

linear pair postulates

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.