Find the measure of the missing angle

Question

a= 71 degree, c=69degree I 'm not sure how to go about in finding the missing angle. Could you please help?

Answer 1

To find the missing angle, we need to remember that the sum of the interior angles of a triangle is always 180 degrees.

So in this case, we have two of the angles given (a=71 degrees and c=69 degrees), and we need to find the missing angle, which we can call angle b.

Using the fact that the sum of the angles in a triangle is 180 degrees, we can set up the equation:
a + b + c = 180

Substitute the given values:
71 + b + 69 = 180

Combine like terms:
140 + b = 180

Subtract 140 from both sides:
b = 40

Therefore, the missing angle, angle b, is 40 degrees.