Tina correctly calculates the value of x in the diagram using the steps shown. 102°
38
,104\مر
Step 1: y = 180 - 104
Step 2: z = 360 - 102 - 38 - (180 - 104)
Step 3: 2 = 144
For which reason is the equation in step 2 true?
А.
The sum of the measures of the angles in a quadrilateral is 360°.
B.
The measure of an angle exterior to an interior angle in a quadrilateral is equal to the sum of the measures of the other interior angles.
C.
The sum of the angle measures x and y is equal to the sum of the measures of the other two angles in the quadrilateral.
D
The angles with measures y and 104 are supplementary