Question

X The measure of two angles in a triangle are shown in the diagram.

to
Which equation can be used to find the value of x?
x
52°
A
B
C
2(52) + x = 180
52 + 2x = 360
52 + 2x = 180
2(52) + x = 360

Answer 1

The equation that can be used to find x is : 52 + 2x = 180

From the diagram, we have an isosceles triangle:

• Second base angle = x (base angles of an isosceles triangles are the same.

Now we have:

52 + x + x = 180 (sum of angles in a triangle is 180)

52 + 2x = 180