Question 1154546
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Show by making a simple diagram.<br>
Draw a triangle with one angle with measure x degrees and another angle with measure 2x degrees.<br>
Bisect the angle with measure 2x degrees.<br>
That divides the triangle into two smaller triangles.<br>
One of those two smaller triangles has two angles with measure x degrees, so it is isosceles.<br>
The other smaller triangle has two angles with measures x and 2x, so it is similar to the original triangle.<br>