Answer:
Linear Pair postulate; triangle angle sum conjecture; subtraction property of equality.
Step-by-step explanation:
The Linear Pair postulate states that if two angles form a linear pair, then the sum of their measures is 180°. This is the reason for the first statement.
The Triangle Angle Sum conjecture states that the sum of the measures of the angles of a triangle is 180°. This is the reason for the second statement.
In order to isolate m∠ZAB, we must subtract m∠CAB from each side. The subtraction property of equality is what allows us to do this.
Answer:
18° and 72°
Step-by-step explanation:
Complimentary angles form 90°
We have an angle (x) 4 times larger than the other (y).
Well actually, a system of equations isn't required, so forget about x and y, just divide 90 by 5. This gives you 18, one of the angle's measurements is 18°. Multiply 18 by 4 and get 72. The other angle's measurement is 72°.
Circumference=diameter times pi
c=12 times 3.14=37.68 cm
3rd option
It must have the [( )]
[(4/y) - z]