<PRE><B>Question 347180</B>
Hi,
*Note: The sum of the angles in a triangle is 180 degrees
.
Let n be the number of degrees in the second angle.
The question states the following to be true:
2*n = the first angle
(n-20) = the third angle
.
Sum of the Angles
2*n + n + (n-20) = 180
.
Simplify and Solve for n
4*n = 200
n = 50 
Measure of the third angle is 30
.
check your answer
100 + 50 + 30 = 180</PRE>