Math Problem Statement
Solution
Let's solve the questions based on the points provided in the image: , , , and .
Step 1: Check if ABCD is a parallelogram
A quadrilateral is a parallelogram if opposite sides are parallel. This requires checking slopes of opposite sides:
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Slope of AB:
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Slope of CD: Since , .
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Slope of BC:
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Slope of AD: Since , .
Since opposite sides are parallel, ABCD is a parallelogram.
Step 2: Check if ABCD is a rectangle
A parallelogram is a rectangle if adjacent sides are perpendicular. Check the product of the slopes of and :
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Product of slopes and : Since the product is , .
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Similarly, , , and (can be verified).
Thus, ABCD is a rectangle.
Step 3: Check if ABCD is a rhombus
A parallelogram is a rhombus if all sides are equal. Use the distance formula to calculate the lengths of all sides:
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Length of AB:
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Length of BC:
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Length of CD:
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Length of AD:
Since all sides are equal, ABCD is a rhombus.
Step 4: Check if ABCD is a square
A quadrilateral is a square if it is both a rectangle and a rhombus. Since is both a rectangle and a rhombus, ABCD is a square.
Summary:
- Is ABCD a parallelogram? Yes.
- Is ABCD a rectangle? Yes.
- Is ABCD a rhombus? Yes.
- Is ABCD a square? Yes.
Would you like more details about any step or further clarification?
Related Questions:
- How do you find slopes of lines to verify parallelism?
- What makes a parallelogram a rectangle?
- How does the distance formula help confirm congruent sides?
- Can a shape be both a rectangle and a rhombus but not a square?
- What conditions define a square in a coordinate plane?
Tip:
When checking for perpendicularity, always multiply the slopes of two lines. If the result is or , they are perpendicular!
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Math Problem Analysis
Mathematical Concepts
Coordinate Geometry
Properties of Quadrilaterals
Formulas
Slope formula: (y2 - y1) / (x2 - x1)
Distance formula: sqrt((x2 - x1)^2 + (y2 - y1)^2)
Theorems
A quadrilateral is a parallelogram if opposite sides are parallel.
A parallelogram is a rectangle if adjacent sides are perpendicular.
A parallelogram is a rhombus if all sides are equal.
A quadrilateral is a square if it is both a rectangle and a rhombus.
Suitable Grade Level
Grades 9-11
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