Exploring Coordinate Geometry Proofs

The video tutorial covers the mid-segment theorem in trapezoids, explaining its properties and proving it using coordinate geometry. It also demonstrates how to use coordinate geometry to prove the properties of quadrilaterals, specifically focusing on proving a quadrilateral is a rhombus. The tutorial emphasizes the use of coordinate assignments and formulas like midpoint and slope to establish geometric properties.

What is the mid-segment in a trapezoid?

• A segment that joins the vertices of the bases

• A segment that joins the vertices of the legs

• A segment that joins the midpoints of the legs

• A segment that joins the midpoints of the bases

According to the mid-segment theorem, the length of the mid-segment is:

• Twice the length of one of the bases

• The sum of the lengths of the two bases

• The difference of the lengths of the two bases

• The average of the lengths of the two bases

What is the first step in proving the trapezoid mid-segment theorem using coordinate geometry?

• Drawing the trapezoid

• Finding the slopes of the sides

• Assigning coordinates to the vertices

• Calculating the lengths of the sides

Why are multiples of 2 used in the coordinates of the trapezoid vertices?

• To make the trapezoid symmetrical

• To simplify the distance formula

• To ensure the midpoints have integer values

• To make the calculations more complex

Tags

CCSS.6.G.A.3

What formula is used to find the midpoints of the sides of the trapezoid?

• Slope formula

• Distance formula

• Midpoint formula

• Area formula

Tags

CCSS.HSG.GPE.B.6

What is the slope of a horizontal line?

• Infinity

• One

• Zero

• Undefined

Tags

CCSS.8.EE.B.5

How do you prove that the mid-segment is parallel to the bases?

• By showing the slopes are equal

• By showing the areas are equal

• By showing the lengths are equal

• By showing the angles are equal

What is the next step after finding the slopes of the segments in the trapezoid?

• Drawing the trapezoid

• Calculating the lengths of the segments

• Finding the midpoints

• Assigning coordinates

What property of a rhombus is used to prove that the quadrilateral inside the rectangle is a rhombus?

• Diagonals bisect each other

• Opposite angles are equal

• Diagonals are perpendicular

• All sides are equal

Tags

CCSS.HSG.CO.C.11

How can you eliminate the possibility of the quadrilateral being a kite?

• By showing all sides are equal

• By showing both pairs of opposite sides are parallel

• By showing there are no right angles

• By showing the diagonals are perpendicular