Question

Find the missing angle and side measures of DABC, given that mDA=65, mDC=90 and CB=15

Answer 1

`360=65+90+15+x`

`360=170+x`
-170 -170

`190=x`

`mCA=190 degrees`

I cant give side lengths until I know a couple, and then that would require some triginometry, which I don't feel like doing right now, to be frank.

Answer 2

You know that all four sided polygons have a total angle measure of 360.

add all the sides you have:

65 + 90 + 15 = 170

Subtract 170 from total(360)

360 - 170 = 190

Missing angle: 190