Question

q no 11&12 answers it

Answer 1

HERE IS THE SOLUTION FOR YOUR'S QUESTIONS;

◆11.

x+x+2+x+4+x+6+x+8 ÷5=13

=>5x+20÷5=13

=>5x+20=13×5

=>5x+20=65

=>5x=65-20=45

=>x=45÷5=9.


So the value of x is 9.



◆12.

We know that 78° =AngleBAC+Angle CAl2.【Alternate Angle】

=>78-35=Angle BAC

=>BAC=43°.


In triangle BAC 【By angle sum property】[ Do it yourself]

We get x=47°.



HOPE it helps