If all interior angle of quadrilateral are in $AP$ . If common difference is $10^o$ , then find smallest angle ?.....$^o$
If all interior angle of quadrilateral are in $AP$ . If common difference is $10^o$ , then find smallest angle ?.....$^o$
- A
$60$
- B
$70$
- C
$120$
- D
$75$
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- [KVPY 2015]
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