What is the circumference of the circle?
21.18
100.17
18.21
9.11

Simplify the expression 10/11(22z) + (a+5) -1

True or false? a circle could be circumscribed about the quadrilateral below.

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2