Plug 129 for x
(-12 x 129)+(14 x 129)-(6 x 129)
Which would be -1548+1806-774
Which equals -516
Slope of -2, y int of 8....
y = -2x + 8
2x + y - 8 = 0 <== general form
The missing angle is 58.
Step by step:
- We know the triangle is equal to 180
180-57-65 = 58
58 is your answer
Since 3 squared is 9 and 4 squared is 16, the square root of 13 will fall somewhere between 3 and 4
Check the picture below.
make sure your calculator is in Degree mode.
