Answer:
a) 40
b) 140
c) 70
d) 30
e) 80
Explanation:
a:
a is an alternate interior angle of 40°. These angles are congruent.
b:
This is a same side interior angle to 40. These are supplemental which means that they add to 180
180 - 40 = 140
c:
The sum of the interior angles of a triangle add to 180. One angle is shown to be 30. The unnamed angle is 80. It is an alternate intermate interior angle with angle e that equals 80.
180 - 30 - 80 = 70
d:
This is an alternate interior angle of 30
e)
The sum of the interior angles of a triangle is 180
180 - 70 - 30 = 80
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