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Mathematics 10 Online
OpenStudy (anonymous):

Look at the two triangular flags below. What is the length of the side BC of triangle ABC?

OpenStudy (anonymous):

OpenStudy (phi):

They are telling you the 2 triangles are congruent. Do you see why? so you know corresponding sides are congruent (= length) set the two expressions = and solve for x. Then use that x value to find the length of side BC

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