Question

Find the measure of angle A. Show equations and all work that leads to your answer.

Answer 1

10=2+18(5x+83)

Explanation:

A math para is a group of one or more “equations” attached to a line in a text paragraph. The text paragraph is the ordinary paragraph discussed in the blog post Paragraphs and Paragraph Formatting (it may be helpful to read that post first)

Answer 2

97°

Explanation:

The sum of all interior angles of n-sided convex polygon is 180°·(n-2).

So,

`(9x-2)+(10x+2)+165+100+(5x+83)+(12x+18)+138=180\cdot (7-2)\\ \\9x+10x+5x+12x=180\cdot 5+2-2-165-100-83-18-138\\ \\36x=396\\ \\x=11`

Hence,

`\angle A=9x-2=9\cdot 11-2=97^(\circ)`