find the missing angle measure The measure of the missing an

find the missing angle measure.
The measure of the missing angle is?

Solution

Let the angles be A=x⁰ ,B=36⁰,C=44⁰

we know that sum of angles of a triangle is 180⁰

i.e.,A+B+C=180⁰

so x⁰+36⁰+44⁰=180⁰

x+80⁰=180⁰

x=180⁰-80⁰

therefore angle A=x=100⁰