Idon't know how to do #86-#88. any ?

Tracy solved the following problem. which of the statements is true? 9 ÷ 3 + 6 × 2 3 + 6 × 2 9 × 2 18 her answer is correct. her answer is incorrect. she should have multiplied before dividing. her answer is incorrect. she should have multiplied before adding. her answer is incorrect. she should have added before dividing.

1. what is the measure of ∠abc? what is the measure of ∠abd?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?