Answer:
c.45 degrees
Step-by-step explanation:
90 -180= 90
90÷2=45
Answer:
9°
Step-by-step explanation:
In a ∆, equal sides make equal angle to the third side. So the angle that's not mentioned is same '2'.
Sum of angles in a ∆ = 180°
80° + m/_2 + m/_2 = 180°
80° + (5x + 5) + (5x + 5) = 180°
10x + 90° = 180°
10x = 90°
x = 9°
Firstly, multiply both sides by 2: 
Next, divide both sides by h: 
Next, subtract both sides by b1, and <u>your answer will be
</u>
28+72 put into distributive property is 4(7+18)