# G.GCO.9 Isosceles Trapezoid Template (Scaffolded Discovery)

The applet below contains a quadrilateral that ALWAYS remains an

**ISOSCELES TRAPEZOID**. The purpose of this applet is to help you understand many of the geometric properties an**ISOSCELES TRAPEZOID**has. The questions you need to answer are displayed below this applet.**Questions:**Use your observations from interacting with this applet to investigate the answers to the following questions: 1) Is an isosceles trapezoid a parallelogram? 2) Are opposite sides of an isosceles trapezoid congruent? If so, how many pairs? 3) Are opposite angles of an isosceles trapezoid congruent? 4) Do the diagonals of an isosceles trapezoid bisect EACH OTHER? 5) Does a diagonal of an isosceles trapezoid bisect a pair of opposite angles? 6) Are the diagonals of an isosceles trapezoid perpendicular? 7) Are the diagonals of an isosceles trapezoid congruent? 8) Does either diagonal of a isosceles trapezoid serve as a line of symmetry? If so, how many?

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