Answer:
Explanation:
Question 6
The marked angles are vertically opposite angles and are of equal measure per the property of vertical angles.
- (2/3)x = 90
- x = 90 : 2/3
- x = 90 *3/2
- x = 145
Question 7
The marked angles form a linear pair and their sum is a straight angle, with the measure of 180°.
- 4x + 5x - 27 = 180
- 9x - 27 = 180
- 9x = 180 + 27
- 9x = 207
- x = 207/9
- x = 23