Find the value of x by step by step explanation​

We can find the value of x is two ways:

Given:

• The two interior opposite angles = and

• Measure of exterior angle =

To calculate:

• Measure of x.

Calculation:

We know that,

• Sum of two interior opposite angles = Exterior angle of ∆

→

→

→ [Ans...]

Given:

• Measure of two interior angles = and

• Measure of exterior angle =

To calculate:

• Measure of x.

Calculation:

Third interior angle of ∆ :–

→ 180° - 120° [By linear pair]

→ 40° [Third interior angle of ∆]

Now,we know that

• Sum of interior angles of ∆ = 180°

→ 80° + x° + 40° = 180°

→ 120° + x = 180°

→ x = 180° - 120°

→ x = 40°