Question

What is the value of X ?
CHALLENGE​

Answer 1

Given: Exterior angle = 70°

Opposite interior angles = 45° and X

To find: X

Solution:

We know that, An exterior angle of a triangle is equal to the sum of the opposite interior angles.

i.e. In this triangle, Exterior angle = Sum of opposite interior angles.

$\\\\\Rightarrow70=45+x\\\\\Rightarrow\ x=70-45\\\\\Rightarrow\ x=25$

Hence, the value of x is $25^{\circ}$.

Answer 2

Answer

25

Step-by-step explanation:

Given: Exterior angle = 70°

Opposite interior angles = 45° and X

To find: X

Solution:

We know that, An exterior angle of a triangle is equal to the sum of the opposite interior angles.

i.e. In this triangle, Exterior angle = Sum of opposite interior angles

⇒70=45+x

⇒ x=70−45

⇒ x=25