To find your missing angle:
180-126 = 54
so 9x must equal 54
54= 9x
6 = x
The answer you put in is y = 1/2 + 4
Its 150 cause V is 1/3*Area*height
Answer:
measure angle D = 62
Step-by-step explanation:
as the sum of measures of triangle =180
then (8x-40)+(4x-10)+(3x+20)=180
15x-30=180
x=(180+30)/15=14
XYZ SIMILAR TO PDQ
Y=D=3*14+20=62
<span>Your answer would be 360 the sum of the exterior angles of any convex polygon is 360 degrees</span>
