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Sagot :
Answer:
x = 60°
Step-by-step explanation:
This is a congruent triangle, and the extension is parallel to one side, also making it 60°. All congruent triangles are equilateral.
Hope this helps! :-)
Answer:
a) x = 60°
b) since it is an equilateral triangle, all 3 inside corner angles = 60°.
since the 2 horizontal lines are parallel, x = the same side interior angle of 60°
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