Somebody please help me with math on my profile!!

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

If a || b and e || f , what if the value of y ?