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25-04-2020
Mathematics

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15. In the diagram AB is parallel to CD.
Calculate the value of a.
NOT TO
SCALE

15 In the diagram AB is parallel to CD Calculate the value of a NOT TO SCALE class=

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upandover upandover

25-04-2020

Same-side interior angles, which are shown here, are supplementary, which means that they add up to 180 degrees.

5a + a = 180

6a = 180

a = 30 degrees

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