Aangles of an equilateral triangle are congruent. if x represents the measure of the third angle of the triangle, what is x?

a) x+x=90
b) x+x+x=90
c) x+x=180
d)x+x+x=180

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“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .

Common ratio, exponential function, half-life that's all i have so