1.

In the formula `angleA+angleB+angleC=180^(@)`, if `angleA=90^(@)` and `angle B=55^(@)`, then `angleC=`_______A. `45^(@)`B. `45^(@)`C. `25^(@)`D. `35^(@)`

Answer» Correct Answer - D
Given `angleA+angleB+angle+angleC=180^(@)`
`rArr angle C=180^(@)-(angleA+angleB) `
`rARr angleC=180^(@)-(90^(@)+55^(@))` (given)
`rArr angleC=35^(@)`.


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