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With these problems I first work out the whole circumference, and then work out the fraction for the arc.
So cancel a 2 top and bottom and it's done.
Now for question 10.
What you have done is exactly right so something else is wrong here.
I started the next lesson about Circumference and Arc Length and I got all the 18/20
No I did #20 and got it correct
You are very welcome.
Thank you for the help!
Yes, that's it. Excellent!
The thing is this. There is a property that is always true for all circles and Q19 is testing it.
is always a right angle right?
I said #102 before seeing post #101
when I measure the one you drew on the screen I get A is 30 degrees C is 70 D is 80
You've made up 60 and 30 because that's what those angles look like. But remember D could be anywhere on the circumference.
I drew a circle and the first half is 30, 30, 120 the second is 60 60 60 it looks exactly like your triangle in the diagram but cut in half at 120
but i think i should add 60 +30 which gives me 90