The diagram below shows a square inside a regular octagon. the apothem of the octagon is 13.28 units. to the nearest square unit, what is the area of the shaded region?

1. are the triangles similar and if so why? what is the value of x? show your work.

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

(10. in the figure, a aabc is drawn tocircumscribe a circle of radius 3 cm ,such thatthe segments bd and dc are respectively oflength 6 cm and 9 cm. find the length ofsides ab and ac.