CHAPTER-4, TRIANGLES 1. The length of the hypotenuse of an isosceles right triangle whose one side is 4√2 cm is 12√2 cm 8√2 cm 8 cm 12 cm 2. If a ladder is placed in such a way that its foot is at a distance of 12 m from the wall and its top reaches a window 9 m above the ground, then the length of the ladder is 21 m 24 m 18 m 15 m 3. The perimeter of an isosceles right triangle, the length of whose hypotenuse is 10 cm is 10(√2 + 1) cm 20√2 cm 20 cm (10√2 + 9) cm 4. The areas of two similar triangles are 100 cm^{2} and 49 cm^{2}. If the altitude of the larger triangle is 5 cm, then the corresponding altitude of the smaller triangle is equal to 5.4 cm 3.5 cm 4.5 cm 3.9 cm 5. Corresponding sides of two similar triangles are in the ratio 9 : 5. Areas of these triangles are in the ratio 5 : 9 21 : 85 81 : 25 9 : 5 6. ABCD is a trapezium in which AB ∥ DC and AB = 2DC. Diagonals AC and BD intersect at 0. If ar(△A0B) = 84 cm^{2}, then ar(△COD) is equal to 28 cm^{2} 24 cm^{2} 42cm^{2} 21 cm^{2} 7. The areas of two similar traingles are 121 cm^{2} and 64 cm^{2} respectively. If the median of the first triangle is 13.2 cm, then the corresponding median of the other triangle is equal to 9.6 cm 8.1 cm 11 cm 11.1 cm 8. In △ABC if AB = 4 cm, BC = 8 cm and AC = 4√3 cm, then the measure of ∠A is 60° 30° 45° 90° Loading … Question 1 of 8