Not sure if i already asked this one! Math help please :)

What two criteria are needed for triangles to be similar

Nick and nora are married and have three children in college. they have an adjusted gross income of 47,400. if their standard deduction is 12,600 itemized deductions are 14,200 and they get an exemption of 4000 for each adult and each dependent what is their taxable income

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.