Question

if angle of triangle are ( x - 10 ) degree , ( 2x + 10 ) degree and ( 6 x ) degree then value of x is ( a ) 40 , (b) 30 ,( c ) 20 , (d) 90 ​

Answer 1

Answer:

OPTION C IS CORRECT.

Step-by-step explanation:

$by \: angle \: sum \: property \\ \\ (x - 10) + (2x + 10) + 6x = 180 \\ \\ 9x = 180 \\ \\ x = 20$