What is the area of a circle with a diameter of 16? 8 16 64 128 256

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Find the area of a parallelogram with base 15 yards and height 21 2/3

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