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# GCSE help please for exam on Wednesday watch

1. I'm a mature student who is doing GCSE Maths Equivalence. I did my GCSE but it was 7 years ago and I'm having a mental block. I've attached 2 questions from the practice exam papers and wondering if anyone should shed some light please. I have an exam on Wednesday.

2. (Original post by crashdoll)
I'm a mature student who is doing GCSE Maths Equivalence. I did my GCSE but it was 7 years ago and I'm having a mental block. I've attached 2 questions from the practice exam papers and wondering if anyone should shed some light please. I have an exam on Wednesday.

You need to use the rules relating to alternate, corresponding and supplementary angles.

Alternate ("Z") angles of parallel lines are equal, so the two angles in the "corners" of the Z are the same.

Corresponding ("F") angles of parallel lines are equal, so the angles in the "corners" are equal (i.e. where the horizontal line meets the vertical line).

Supplementary ("C") angles of parallel lines add up to 180 degrees, so if you have a squared-off C, the top-left "corner" and bottom-right "corner" angles add up to 180 degrees.

Remember too that angles on a straight line total 180 degrees.

Also, vertically opposite angles are equal, so if you have an X, the top and bottom angles are the same, and the left and right ones are equal (this happens around a point, if you see what I mean).

Hope this helps.

EDIT: These diagrams might make things clearer.
3. Thanks for the links, they were great.

So, can I just check......

Question 1: a = 68 b =112 c = 112
Question 2: a = 117 b = 63 and c = 117

or am I barking up the wrong tree?
4. (Original post by crashdoll)
Thanks for the links, they were great.

So, can I just check......

Question 1: a = 68 b =112 c = 112
Question 2: a = 117 b = 63 and c = 117

or am I barking up the wrong tree?
Yep, spot on.
5. Thank you!! It's actually really simple. I don't know why I was finding it so hard. To be honest, our teacher is pretty useless and she was confusing me.
6. Thank you for the help. I passed it!
7. Great stuff, well done!

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