Question

the three angles of a quadrilateral are 60 degrees 70 degrees and 90 degrees then find the another angle​

Answer 1

Answer:

Sum of interior Angle of quadrilateral is 360 degree

Let x be the unknown angle

360 = x +60+70+90

360 = x + 220

x = 360 - 220

x = 140 degree

verification 60 + 70 + 90 + 140 =360 degree

I hope it will help u mate

Answer 2

$by \: angle \: sum \: property \: of \: a \: qardilateral \: \\ \\ \\ \\ \alpha + \beta + \gamma + x \: = 360$

Given

1. α =60°
2. β = 70°
3. y = 90°

let x be the angle to be found....

therefore

$60 + 70 + 90 + x = 360 \\ \\ x = 360 \: \: - 220 \\ \\ x = 140 {}^{.}$

__________________________❤

hope this helped

#khushi here