In ΔABC, a = 19, c = 10, and m∠A = 111. Which statement can be used to find the value of C?
To find the value of angle C in triangle ABC, we can use the fact that the sum of the angles in any triangle is 180 degrees.
In triangle ABC, we know that angle A is equal to 111 degrees.
We can use the equation:
m∠A + m∠B + m∠C = 180
Substituting the known values:
111 + m∠B + m∠C = 180
To isolate m∠C, we can subtract 111 from both sides:
m∠C = 180 - 111 - m∠B
So, the statement that can be used to find the value of angle C is:
m∠C = 180 - 111 - m∠B