Question

find the angle measure X angle a=70and


angle b=90​

Answer 1

90+70+x=180
160+x=180
x=180-160
x=20

Answer 2

angle of what?? quadrilateral or triangle??

there is only two values are given so that solving it on basis of triangle...

a=70

b=90

x= ?

In ∆abc, <a + <b + <c = 180°

so, 70 + 90 + x = 180°

160 + x = 180°

x = 180° - 160°

( x = 20° ) ans