Coordinate Geometry Proofs

What formula do you use to decide if there is a right angle based on coordinates? 

• distance
• midpoint
• slope
• partitioning a segment

Find AB given A(1,4) and B(3,9).

• √185
• √173
• √29
• √41

Find the slope of the line.

• -2
• 2
• -1
• 1

How do you show that sides have the same length?

• slope formula

• midpoint

• distance formula

how are lines parallel?

• same slope

• opposite reciprocal slope

• Pythagorean theorem

• distance formula

how are lines perpendicular?

• same slope

• opposite reciprocal slope

• Pythagorean theorem

• distance formula

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.

• Find the slope of all 4 sides.

• Find the midpoint of all 4 sides.

• Find the length of all 4 sides.

• Find the length of 2 sides.

In a parallelogram, consecutive angles are __________.

• congruent
• supplementary
• corresponding
• parallel

Which is NOT a property of a parallelogram?

• Diagonals bisect each other
• Diagonals are congruent
• Both pairs of opposite sides are parallel
• Both pairs of opposite angles are congruent