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3-94.

Plot ΔABC on graph paper with vertices A(8, –4), B(8, 1), and C(2, 0). 3-94 HW eTool (Desmos) Homework Help ✎.

  1. What is the area of ΔABC?

  2. ΔABC is rotated about the origin 180° to become ΔABC′. Name the coordinates of A′, B′, and C′.

  3. This time ΔABC is rotated 180° about point C to form ΔABC″. Name the coordinates of B″.

  4. If ΔABC is rotated 90° clockwise (↻) about the origin to form ΔA′′′B′′′C′′′, what are the coordinates of point A′′′?

    Use the eTool below to solve each part of the problem.
    Click the link at right for the full version of the eTool: Int1 3-94 HW eTool.