If you have the two other angle measures:
You can add the angles together and subtract them from 180.
Example:
Angle 1: 90
Angle 2: 45
Angle 3: ?
90 + 45 = 135
180 - 135 = 45
Angle 3 is 45 degrees.
This is because all three angles of a triangle need to be equal to 180 when added up.
Answer:
D) 9
Step-by-step explanation:
Using proportions, we have
12/2 = 54/x
Cross multiplying, we have
12(x) = 2(54)
12x = 108
Divide both sides by 12:
12x/12 = 108/12
x = 9
Answer:
#1 The balance after 21 months is $9960.
#2 $1,360
#3 The total cost of boring the 750 meters is $37,700.
