Question

http://postimg.org/image/75sg7n29j/6d290ac5/
Find the measure of angle A. Show equations and all work that leads to your answer.

thanks in advance!

Answer 1

find the measure of angle x?

Answer 2

no, i don't know how to

Answer 3

I'm asking, did you mean to say 'x' not 'a' becuase in teh attachment all there are are 'x's not a's

Answer 4

no the angle A is what im trying to solve for

Answer 5

oh haha, i get it!
first we have to solve for x, then plug x into (9x-2) to find angle A,
got it

Answer 6

yes, now would you mind explaining how to solve for x please :)

Answer 7

so this is a polygon with 7 angles, the sum of all the interior angles = 900
so write up an equation that is like this:
900 = angle a + angle b + angle c + and so on, then solve for x ^_^

Answer 8

awesome! thanks man that will help alot

Answer 9

lemme know what you get for x ^_^

Answer 10

ok just a second an i will let you know

Answer 11

i came up with 11= x

Answer 12

bingo!

Answer 13

now you get how to do it, let me show you why i gave you 900

Answer 14

your shape given is a 'polygon' a triangle is a type of polygon, a square is a type of polygon. essentially a polygon means any shape that makes a loop.
so here is where the 900 came from:
equation of polygons:
sum of all interirior angles = (n-2)*180, where n is the number of angles.

so, you had 7 angles, so
(7-2)*180 = 900

make sense for next time? ^_^

Answer 15

that is awesome :) ive been trying to figure out how they got that number for a long time now! thanks so much!

Answer 16

ur welcome!