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Mathematics 9 Online
faithkristine:

ss below

faithkristine:

faithkristine:

wrong ss

faithkristine:

faithkristine:

@AZ

AZ:

okay, remember how everything adds up to 360? So do you see on the outside of the circle, we have 54, 110, 130 and JK that all adds up to 360

faithkristine:

ok

AZ:

But first, let's solve for 'b' Do you see how the angle and the arc go together?

1 attachment
AZ:

if the arc is 110 what is the value of the inscribed angle?

AZ:

then to find the value of b, you just have to divide by 4 since 4b = that inscribed angle

faithkristine:

ok you lost me

AZ:

Okay so forget that it says 4b We just have something like this. What is the angle?? |dw:1619919540359:dw|

AZ:

oh wait I'm dumb

faithkristine:

lol

AZ:

@az wrote:
okay, remember how everything adds up to 360? So do you see on the outside of the circle, we have 54, 110, 130 and JK that all adds up to 360
We need to first calculate what JK is 54 + 110 + 130 + JK = 360

AZ:

what is JK equal to?

faithkristine:

like the angle or letters?

AZ:

uhh the letters are representing the angle

AZ:

think of it like an 'x' 54 + 110 + 130 + x = 360

faithkristine:

so find x?

AZ:

yes

faithkristine:

66

faithkristine:

??

AZ:

yes

faithkristine:

so is that a or b

AZ:

Neither What is 110 + 66 = ?

1 attachment
faithkristine:

176

AZ:

So the entire JKL is 176 |dw:1619920166413:dw| If the arc is 176 then the inscribed angle is going to be half of that which is what?

faithkristine:

88

AZ:

okay and that angle is equal to 4b so 4b = 88 then what is b equal to?

faithkristine:

88?

faithkristine:

haha im not confident in this as you can see

AZ:

how?

faithkristine:

wym how

AZ:

4b = 88 4 times a number equals 88 how would 'b' be equal to 88

faithkristine:

oh i forgot to do that

faithkristine:

4 times 22 equals 88

AZ:

yes, so b is 22

faithkristine:

ok

AZ:

now for a what is 54 + 66 = ?

1 attachment
faithkristine:

121

AZ:

are you sure?

faithkristine:

crap my bad i meant 120

faithkristine:

i thought it said 55+66 not 54

AZ:

so we have |dw:1619921067167:dw| what is the inscribed angle if the arc is 120?

faithkristine:

how do i find it again?

AZ:

inscribed angles are half of the arc

faithkristine:

60

AZ:

yes and now look at your question the value of that angle says 3a so that means 3a = 60 what does a equal?

faithkristine:

20?

AZ:

Yup! That's the value of a

faithkristine:

thanks

AZ:

you're welcome!

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