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A B C D is a parallelogram in which di...

`A B C D` is a parallelogram in which diagonal `A C\ ` bisects `/_B A Ddot` If `/_B A C=35^@` , then `/_A B C=` `70^@` (b) `110^@` (c) `90^@` (d) `120^@`

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Given: ABCD is a parallelogram in which `angleBAC=35^@`
Solution : AC is a bisector of angle BAD
So, `angleA=2angleBAC`
`angleA=2xx35^@`
`angleA=70^@`
Now, `angleA+angleB=180^@` ( supplementary angles)
`70^@+angleB=180^@`
...
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