A triangle has three angles a, b and c.
Angle b = 7 and angle c = 9
What is angle a?
To find angle a, we can use the fact that the sum of the angles in a triangle is always 180 degrees. Therefore, we can use the following equation:
a + b + c = 180
Substitute the given values for angles b and c:
a + 7 + 9 = 180
a + 16 = 180
Subtract 16 from both sides:
a = 180 - 16
a = 164
Therefore, angle a is 164 degrees.