What is the value of x in the triangle ?

The geometric mean has to multiply to 100. There’s a 4. To get to 100, you need a 25. AB+DB should equal 100. So x would have to equal 21. To prove this, 25 x 4 = 100. The square root of 100 is 10 which proves the answer for x is 21. I hope this helps!

This polygon has 4 sides
180(4-2) = 180(2) = 360 degree
80+90+2x + 3x = 360
170+5x = 360
5x = 190
x= 38
measure of angle t is 2(38)= 76
the answer is c. trust me
hope this !

No i refuse to tell you the answer but the estimate is 10