Answer:
c= 30
Step-by-step explanation:
To find the value of c, start by forming an equation using the ∠ sum of ∆ property.
c° +60° +90°= 180° (∠ sum of ∆)
Simplify:
c° + 150°= 180°
c°= 180° -150°
c°= 30°
c= 30
Notes:
- The sum of the angles in a triangle is 180°, which is abbreviated as '∠ sum of ∆'.
- The angle indicated by a square is called a right angle, and has a value of 90°.
