Devon has 80 books to pack in boxes.She packs 20 books i each box.How many boxes does she need?
2 answers:
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#a
m<5=40°
- Reason-Its Given
#b
m<2=140
- Reason-Given
#c
<5 and <2 are linear pair(looked properly in diagram) Hence they are supplementary.
#d
<5 and 2 are same side interior angles (Clearly shown on diagram .
- We can call them co responding interior angles and their sum will be 180 if lines are parallel
#e
a||b
Let's verify
Let the angle below <1 be <3
Now
<2+<3=180
<5+<4=180
- <5=<2
Hence verified