Question

the three interior angle of a quadrilateral are 100°,92° and 98° respectively .find the fourth angle​

Answer 1

$\bf \: Let \: the \: fourth \: angle \: be \: x.$

$\bf \: Then, \: by \: \underline{angle \: sum \: property \: of \: quadrilateral}$

$\bf \: 100\degree + 92\degree + 98\degree + x \: = 360 \degree$

$\bf \: x \: = 360 \degree - (100\degree + 92\degree + 98\degree)$

$\bf \: x \: = 360 \degree - 290 \degree$

$\bf \: x \: = 70 \degree$

$\underline{ \underline{ \boxed{ \pink{\bf \: So, \: the \: Fourth \: angle = 70 \degree}} }}$

Answer 2

$\huge \bf\underline\red{Question}$

The three interior angle of a quadrilateral are 100°,92° and 98° respectively .Find the fourth angle.

$\huge \bf\underline\red{Answer}$

$\bf \green{Here \: Let \: the \: 4th \: angle \: be \: = x}$

$\bf \green{Now \: Adding \: all \: 4 \: angles}$

$\sf \boxed {100° + 92° + 98° + x = 360° }$

$\sf \boxed {290° + x = 360° }$

$\sf \boxed { x = 360 - 290}$

$\bf\fbox\pink{x = 70° }$

$\bf \green{→Fouth \: Angle \: = 70°}$

$\bf\underline\red{Hope \: It \: Helps \: You}$