Areas formulas: - Square: A = a^{2}, where a is the length of the side of the square. - Rectangle: A = l×w, where l and w are the lengths of the rectangle's sides (length and width). - Triangle: where b and h are the base and height - Circle: A = πr^{2} where r is the radius. - Trapezoid: where a and b are the lengths of the parallel sides and h the height of the trapezoid. Question 1: What is the area of rectangle ABCD if the length of the diagonal AC is 10? Question 2: What is the area of triangle ABD in the figure below, if ABCD is a trapezoid? 6 8 9 10 Question 3: The ratio of the radii of two circles C1 and C2 is 2.5. The ratio between the areas of circles C1 and C2 is: 2.5 4.75 6.25 1.25 Question 4: The square S and the rectangle R in the figure below have equal areas. What are the length and the width of the rectangle R, if the sides of square S measure 6cm each, and if the perimeter of rectangle R measures 26cm? 12cm and 3cm 7cm and 6cm 6cm and 6cm 9cm and 4cm Question 5: Which of the following represents the area of triangle ABC in the figure below? Question 6: The side AB of the ABCD square is 10, AE = ED and BF = FC. What is the area of parallelogram BFDE? 50 55 60 65 Question 7: In the figure below, the area of square ABCD is equal to the sum of the areas of triangles ABE and DCE. If AB = 6, then CE = 2 3 4 5 Press the Submit button to see the results.