3 (C) ar (ABC) (D) ar (ABC) 7. Two parallelograms are on equal bases and between the same parallels. The ratio of their areas is (A) 1:2 (B) 1:1 (C) 2:1 (D) 3:1 8. ABCD is a quadrilateral whose diagonal AC divides it into two parts, equal in area, then ABCD (A) is a rectangle (B) is always a rhombus (C) is a parallelogram (D) need not be any of (A), (B) or (C) 9. If a triangle and a parallelogram are on the same base and between same parallels, then the ratio of the area of the triangle to the area of parallelogram is (A) 1:3 (B) 1:2 (C) 3:1 (D) 1:4 10. ABCD is a trapezium with parallel sides AB = a cm and DC = b cm (Fig. 9.6). E and F are the mid-points of the non-parallel sides. The ratio of ar (ABFE) and ar (EFCD) is (A) a:b (B) (3a + b) : (a + 3b) (C) (a + 3b) : (3a + b) (D) (2a + b) : (3a + b) Fig. 9.6
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(D)