Ð a is the exterior angle of an isosceles D whose two sides, being the radii of the same circle are equal. Therefore, Ð a = Ð x + Ð x = 2 Ð x, or 2x ( since exterior angle is equal to the sum of the interior opposite angles ). Similarly Ð b = 2 Ð y or 2y. \ a + b = 2x + 2y Hence C. Y= Hence A. The lease perimeter of all rectangle with equal areas will be that whose length is equal to its width, i.e. when it is a square. e.g. Consider rectangles with area of each being 64 sq. units. Hence B. Sum of the exterior angles of any polygon, irrespective of the number of sides is a constant and is equal to 3600. Hence C. Test 1 Section 1 : Verbal Section Section 2 : Quantitative Section Section 3 : Analytical Section Section 4 : Quantitative Section Section 5 : Verbal Section Section 6 : Analytical Section Section 7 : Verbal Section Answer Key To Test 1 Answer Explanation To Test 1 Section 1 : Verbal Section Section 2 : Quantitative Section Section 3 : Analytical Section Section 4 : Quantitative Section Section 5 : Verbal Section Section 6 : Analytical Section Section 7 : Verbal Section