Triangle is a shape that forms of three sides and three angles. There are different types of triangle such as isosceles triangle, equilateral triangle and more. However, one fact about the triangle is that the sum of the three angles will always be 180 degrees. Therefore, it is easy to find the one missing angle.
To find the missing angle, we just need to subtract the two angles that are being shown from 180 degrees. For example:
180 – ( 23 + 124 )
180 – 147 = 33
So, the missing angle is equal to 33 degrees.