10=a/2 + 7
First subtract 7 from both sides
3=a/2
Next multiple 2 on both sides, so that a is by itself
3(2)=a
A=6
2 slices
If you take the 1/4, and the 8 (which can be re written as 8/1), and multiply them together, you get two.
1/4*8/1=2
3 * 171 and you are going to get 513
All 3 triangle angles sum to 180 degrees.
So third angle = 180 -40 -60
third angle = 80 degrees
