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GCSE Maths - mathswatch

need help with this question will post the picture here
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Madz178
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here is the question
Capture.PNG57.8KB
Reply 2
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mqb2766
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What can you work out? There are a couple of straightforward angles.
(edited 3 years ago)
Reply 3
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Madz178
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Original post by mqb2766
What can you work out? There are a couple of straightforward angles.

so i found out the angle ABD is 52 degrees , angle bdc is 102 degrees and i thought that triangle BCD is a isosceles so i did 180-102 then divide it to get 39 i put it in the answer box and i didn't work
Reply 4
Avatar for mqb2766
mqb2766
21
Original post by Madz178
so i found out the angle ABD is 52 degrees , angle bdc is 102 degrees and i thought that triangle BCD is a isosceles so i did 180-102 then divide it to get 39 i put it in the answer box and i didn't work

It doesn't say that it's isosceles. Consider the large triangle, can you get ACB using the sin rule?
Then x is given by the angles in a triangle adding to 180.
Reply 5
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Madz178
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Original post by mqb2766
It doesn't say that it's isosceles. Consider the large triangle, can you get ACB using the sin rule?
Then x is given by the angles in a triangle adding to 180.

hi how should i figure out ACB
Reply 6
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mqb2766
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Original post by Madz178
hi how should i figure out ACB

Use the sin rule in the large triangle.
Reply 7
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Madz178
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thanks for the help :smile:

Original post by mqb2766
Use the sin rule in the large triangle

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