1. The ratio of the areas of two triangles is 2 : 3. The ratio of their heights is 3 : 2. If the ratio of their bases is 4 : y, what is y?   Hint Hint       2. The base of an isosceles triangle is 24 cm and perimeter is 64 cm. Find its area (in cm²).   Hint       3. Find the area (in m²) of an isosceles triangle, each of whose sides is 10 m and base 12 m.   Hint       4. Find the length of the hypotenuse (in cm) of an isosceles right-angled triangle having area of 484 cm².   Hint       5. The area of a right-angled triangle is 30 times its base. What is its height (in cm)?   Hint       6. Calculate the height (in cm) of a triangle whose base is 24 cm and area is 180 cm².   Hint       7. The base of a triangular field is five times its height. If the cost of cultivating the field at $32 per hectare is $500, find its height (in m). Note that 1 hectare = 10000 m2.   Hint