Coordinate Geometry Proofs

Which formula is used to show that lengths are equal?

• Slope

• Midpoint

• Distance / Pythagorean Theorem

Which formula is used to show that lengths are parallel or perpendicular?

• Slope

• Midpoint

• Distance / Pythagorean Theorem

Which formula is used to determine if two lengths are bisecting?

• Slope

• Midpoint

• Distance / Pythagorean Theorem

Parallel Lines have ________ slopes.

• Weird

• Opposite

• Opposite Reciprocal

• Equal

Perpendicular Lines have ____________ slopes.

• Weird

• Opposite

• Opposite Reciprocal

• Same

What slope is parallel to:  
m = 4

• 4
• -1/4
• -4
• 1/4

What slope is parallel to:  
m = 3/4

• 4/3
• 3/4
• -3/4
• -4/3

What slope is perpendicular to:  
m = 5/8

• -5/8
• 5/8
• -8/5
• 8/5

What slope is perpendicular to:  
m = 3

• -3
• -1/3
• 1/3
• 3

1

• Find the lengths of the diagonals.

• Find the slope of each diagonal.

• Find the midpoint of each diagonal.

• Find the midpoint of each side.