For questions 9-11 use the figure below

** 9) The circle with centre O is the circum-circle of the triangle**

(A) ∠ABC

(B) ∠DEF

(C) ∠AGH

(D) none of these

** 10) The circle with centre O is the inscribed of the triangle ___**

(A) ∠ABC

(B) ∠DEF

(C) ∠AGH

(D) none of these

** 11) The circle with centre O is the escribed of the triangle**

(A) ∠ABC

(B) ∠DEF

(C) ∠AGH

(D) none of these

For questions 12-14 use the figure below

A circle centre at C touches DE at B and m∠ABE = 40°.

** 12) Find m∠CBA**

(A) 40°

(B) 50°

(C) 80°

(D) 90°

** 13) Find m∠BAC**

(A) 40°

(B) 50°

(C) 80°

(D) 90°

** 14) Find m∠ACB**

(A) 40°

(B) 50°

(C) 80°

(D) 90°

** 15) In the figure below the area of the shaded sector is 85% of the area of the entire circle, what is the value of x?**

(A) 15

(B) 30

(C) 45

(D) 54

** 16) The circumference of a circle is a π units, and the area of the circle is b π square units. If a = b, what is the radius of the circle?**

(A) 1

(B) 2

(C) 3

(D) π