A mathematician to help me solve this question. i will give a reward.

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Find the roots of the equation below. x^2 - 6 + 9 = 0

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.