> Question 1: In the figure below, O is the center of circle C and ABO is a right triangle. Calculate the length of the hypotenuse of triangle ABO as a function of the circumference of circle C:














Question 2: Rectangle ABCD in the figure below has AB = 4, AD = 6 and triangle EBC is isosceles, EB = EC. What is the perimeter of triangle EDC?


10

12

14

15



Question 3: In the figure below, m is the altitude of the equilateral triangle. Calculate the length of a side of the triangle as a function of m.













Question 4: The diagonal AC of rhombus ABCD is 24cm. If the area of the rhombus is 120cm², calculate the length of side AB in cm.

10 cm

12 cm

13 cm

15 cm




Question 5: What is the closest approximation of the value of angle a in the figure below, if AB = 7, BC = 11 and CA = 5?




119.4^o

125.6^o

130^o

132.2^o



Question 6: The sides a, b, c of a right triangle satisfy the relation a² + b² + c² = 18. What is the value of the hypotenuse c?

3

4

5

6



Question 7: If AB = a, AC = 2a and ∠BAC = 60°, calculate the sum of squares of the sides of triangle ABC as a function of a.


4a²

5a²

6a²

8a²




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