Question

find the value of angle X in each of the following figure​

Answer 1

Answer:

Step-by-step explanation:

100+2x = 180 (angle sum property of triangle)

2x equals to 180-100

2x equals to 80 degree

X equals to 80/2

x equals to 40

Answer 2

Answer: x= 40

Step-by-step explanation:

in tri DEF

We can clearly see that tri DEF is an isoceles triangle( because side ED and EF are equal and angle D and F are also equal  i.e. given)

As we know the sum of all angles in a tiangle equals 180 degree

So,

angD+angE+angF= 180

x+x+100= 180

2x+100=180

By transposing 100

2x= 180-100

2x= 80

x=80/2

x= 40