Find the value of x. 3
If necessary, you may learn what the markings on a figure indicate.
690
ro
x =

x=69

isosceles triangle are equal 69+69=138

180-138=42

180-42=138

138÷2=69

Step by step

Both triangles are isosceles.

For the right triangle:

69+69=138

180-138=42

For the right angle:

The 42 degrees meets at a right angle.

90-42=48

For the left triangle:

180-48=132

132÷2=66

x=66°

answer: the common difference is -0.10

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