What is the length of the altitude of the equilateral triangle below

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer