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Sagot :
Based on the properties of the angles of a parallelogram, the value of each variable are:
- b = 90
- d = 100°
- c = 80°
The Angles of a Parallelogram
- The opposite sides of a parallelogram have the same equal measure, that is they are congruent.
- Adjacent angles or consecutive interior angles of a parallelogram are supplementary, that is their sum equals 180 degrees.
Thus:
(b - 10) + (b + 10) = 180
b - 10 + b + 10 = 180
Add like terms
2b = 180
b = 90
d = b + 10 (opposite angles)
Plug in the value of b
d = 90 + 10
d = 100°
c = b - 10
Plug in the value of b
c = 90 - 10
c = 80°
Therefore, based on the properties of the angles of a parallelogram, the value of each variable are:
- b = 90
- d = 100°
- c = 80°
Learn more about parallelogram on:
https://brainly.com/question/11627202

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