Answer:
45°
Step-by-step explanation:
A triangle is a polygon that has three sides and three angles. There are different types of triangles such as equilateral triangle, isosceles triangle, scalene triangle, right angled triangle.
All the three angles in a triangle add up to 180°.
From the question:
x + 2x + 45 = 180° (sum of angles in a triangle)
Adding alike terms:
3x + 45 = 180
Subtract 45 from both sides:
3x + 45 - 45 = 180 - 45
3x = 135
Divide both sides of the equation by 3 to find x:
3x / 3 = 135 / 3
x = 45°
Therefore:
The value of x is 45°
