1. Angle DEF
2. Definition of congruent angles
3. The measure of angle GHI
Answer:
m∠1 = 25° (opposite angles are congruent)
m∠2 = 87° ⇒ 180 - (25 + 68)
m∠3 = 68° ⇒ 180 - (87 + 25)
Hope this helps!
Answer:
The substance decays by 7.5% every year
Step-by-step explanation:
The answer is 11. Hope this helped.