As we can see the given diagram represents an isosceles trapezoid.
So we can say from the properties of isosceles trapezoid.


As the required side XY has a length y+1, So we can write

2 and 8 have fixed places - 2 in the ten-thousands place and and 8 in the ones place (number must be even).
There remaining 3 numbers left can be arranged in

ways.
So, there are 6 different ways.
This is known as a Segment. Point A to Point B.
2x^2 - quadratic - monomial
-2 - constant - monomial
3x - 9 - linear - binomial
-3x^2 - 6x + 9 - quadratic - trinomial
To find the length of the altitude, we have to use the ratios of the similar sides.
Let the length of altitude=x
Ratio of sides:

So length of altitude is 9 cm.
Answer: 9 cm