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Mathematics 7 Online
OpenStudy (smart8thgrader):

https://app37.studyisland.com/pics/160006question1.png Given trapezoid WXYZ shown above, determine how triangles WXZ and XZY can be shown to be similar. Since XZW ZYX and WXZ XZY, the triangles are similar by angle-angle. Since XZW ZYX and XZ = WZ, the triangles are similar by angle-side. Since XZW ZYX and WXZ YXZ, the triangles are similar by angle-angle. Since XZW ZYX and XZ = ZX, the triangles are similar by angle-side.

OpenStudy (smart8thgrader):

@chycora

OpenStudy (chycora):

i'll help but fyi i'm in the 7th

OpenStudy (smart8thgrader):

okay

OpenStudy (chycora):

k

OpenStudy (smart8thgrader):

@confluxepic

OpenStudy (chycora):

i think it's either Since XZW ZYX and XZ = WZ, the triangles are similar by angle-side. or Since XZW ZYX and XZ = ZX, the triangles are similar by angle-side. hope i helped

OpenStudy (mathstudent55):

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OpenStudy (mathstudent55):

Since we have a trapezoid, by definition, the two sides marked above, ZY and WX, are parallel. Also, we are given angles 1 and 2 are right angles.

OpenStudy (mathstudent55):

All right angles are congruent, so angles 1 and 2 are congruent. That is one pair of corresponding angles that are congruent.

OpenStudy (mathstudent55):

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OpenStudy (mathstudent55):

Lines ZY and WX are parallel lines. Line XZ is a transversal. Angles 3 and 4 are alternate interior angles, and therefore congruent. That is a second pair of corresponding congruent angles. By angle-angle, the triangles are similar.

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