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MA.912.G.3.4 Theorems Involving Quadrilaterals

 

texas instruments ti 30xs

Two-Dimensional

Three-Dimensional

Trig & Discrete Math

In Your Text

Section 6-1; 389-397
Section 6-2; 399-407
Section 6-3; 409-417
Section 6-4; 419-425
Section 6-5; 426-434
Section 6-6; 435-444
Section 7-2; 465-473

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What You Need To Know...

Theorems involving quadrilaterals.

  1. The benchmark will be assessed using MC (Multiple Choice) and FR (Fill in Response) items.
  2. Items may require the use of relationships among quadrilaterals (square, rectangle, rhombus, parallelogram, trapezoid, and kite).
  3. Items may include proofs.

Example One

Figure ABCD is a rhombus.  The length of AE
is (x + 5) units, and the length of EC
is (2x - 3) units.

3-4

 

Which statement best explains why the equation x + 5 = 2x - 3 can be used to solve for x?

  1. All four sides of a rhombus are congruent.
  2. Opposite sides of a rhombus are parallel.
  3. Diagonals of a rhombus are perpendicular.
  4. Diagonals of a rhombus bisect each other.

CLICK HERE FOR SOLUTION

Example Two

Four students are choreographing their dance routine for the high school talent show.  The stage is rectangular and measures 15 yards by 10 yards.  The stage is represented by the coordinate grid below.  Three of the students - Riley (R), Krista (K), and Julian (J) - graphed their starting positions, as shown below.

3-4B

Let H represent Hannah's starting position on the stage.  What should be the x-coordinate of point H so that RKJH is a parallelogram?

Blank Grid

 

CLICK HERE FOR SOLUTION

Additional Examples

coming-soon

VideoTutorial
Quadrilateral Overview
Please select a video file.
Sides of Parallelograms
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Angles of Parallelograms
Please select a video file.
Parallelogram Diagonals
Please select a video file.
Diagonals of a Rhombus
Please select a video file.
Trapezoids and Kites
Please select a video file.

Reference Sheet

reference