Answer:
Type of angle - Obtuse
Key information - 180° - 82° = 98° (missing angle)
Equation -
![y=17.2](https://img.qammunity.org/2022/formulas/mathematics/middle-school/i3uguql3kzami5nu6796m4tk2ojnok5qpj.png)
Explanation:
Let's solve for the missing angle first! 180° - 82° = 98°. 180 represents the total among the angles so we use 180 degrees.
then use the statement to solve for y and make it equal to 98°
![(5y+12)=98](https://img.qammunity.org/2022/formulas/mathematics/middle-school/r0eia3c704dxkanl3m40yqvgxneu6zzof4.png)
= -12 subtract 12 from both sides
= 86 Now solve for y by dividing 86 ÷ 5
y = 17.2