Find the missing angle and side measures of DABC, given that mDA=65, mDC=90 and CB=15
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
\(360=65+90+15+x\)
\(360=170+x\)
-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.