What is the approximate area of the circle shown below?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

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