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Amira is writing a coordinate proof to show that the area of a triangle created by joining the midpoints of an isosceles triangles is one-
fourth the area of the isosceles triangle. She starts by assigning coordinates as given.
D(0,0)
E(2a, 2b)
R
9
4.08 Quiz: Coordinate Proofs
P(2a, 0) F(40,0)
Enter your answers, in simplest form, in the boxes to complete the coordinate proof.
Point Q is the midpoint of DE, so the coordinates of point Q are (a, b).
1022-504 4
9:54 PM
10/27/2002