abce is an isosceles trapezoid and acde is a rectangle . ab = 10 and ec = 20 . what is the length of ae .
as abce is an isosceles trapezoid and ec is twice times ab , we can consider the given trapezoid as half of a regular hexagon ( as length of diagonal in regular hexagon is always double the side ) . thus , sides ab = ae = bc . = > ae = 10 . answer : b
sqrt(divide(add(subtract(power(20, const_2), power(subtract(20, divide(subtract(20, 10), const_2)), const_2)), power(divide(subtract(20, 10), const_2), const_2)), const_2))