Question

given only the information in the image, what is the best description of quadrilateral club?
cl||bu
cb = lu
m∠l = 78°
isosceles trapezoid
not a trapezoid
trapezoid
not enough information to decide

Explanation:

Step1: Recall trapezoid definition

A trapezoid has one pair of parallel sides. Given $\overline{CL}\parallel\overline{BU}$, it is a trapezoid.

Step2: Recall isosceles - trapezoid property

An isosceles trapezoid has non - parallel sides equal. Here $\overline{CB}=\overline{LU}$, so it is an isosceles trapezoid.

Answer:

A. Isosceles trapezoid