Geometry: Quadrilateral Properties and Theorems
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Questions and Answers

A quadrilateral with all four sides congruent and all four angles right angles is a:

  • Square (correct)
  • Rectangle
  • Parallelogram
  • Rhombus

In a parallelogram, the diagonals:

  • Are always congruent
  • Are always parallel
  • Bisect each other (correct)
  • Are always perpendicular

If the lengths of the legs of a right triangle are 5 and 12, what is the length of the hypotenuse?

  • 18
  • 13 (correct)
  • 17
  • 16

Which of the following statements is TRUE about a trapezoid?

<p>At least one pair of opposite sides are parallel (D)</p> Signup and view all the answers

Two triangles are similar if:

<p>Corresponding angles are congruent and corresponding sides are proportional (A)</p> Signup and view all the answers

Flashcards

Sum of Angles in Quadrilaterals

The total measure of interior angles in a quadrilateral is 360 degrees.

Properties of Parallelograms

In parallelograms, opposite sides are parallel and equal, opposite angles are equal, and diagonals bisect each other.

Pythagorean Theorem

In a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

Properties of Rhombuses

Rhombuses have all sides equal, diagonals perpendicular, and diagonals bisect opposite angles.

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Similar Triangles

Triangles that have the same shape but not necessarily the same size, with congruent angles and proportional sides.

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Study Notes

Quadrilateral Classification

  • Quadrilaterals are polygons with four sides.
  • Different types include parallelograms, rectangles, rhombuses, squares, trapezoids, isosceles trapezoids, and kites.

Sum of Angles in Quadrilaterals

  • The sum of the interior angles of any quadrilateral is 360 degrees.

Properties of Parallelograms

  • Opposite sides are parallel and congruent.
  • Opposite angles are congruent.
  • Consecutive angles are supplementary (add up to 180 degrees).
  • Diagonals bisect each other.

Theorems on Rectangles

  • All angles are right angles (90 degrees).
  • Diagonals are congruent and bisect each other.

Pythagorean Theorem

  • In a right triangle, the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides (legs). a² + b² = c²

Theorems on Rhombuses

  • All sides are congruent.
  • Diagonals are perpendicular to each other.
  • Diagonals bisect opposite angles.

Theorems on Squares

  • All sides are congruent.
  • All angles are right angles (90 degrees).
  • Diagonals are congruent, perpendicular, and bisect opposite angles.

Midline Theorem

  • The segment connecting the midpoints of two sides of a triangle is parallel to the third side and is half as long.

Trapezoids

  • A quadrilateral with at least one pair of parallel sides.

Isosceles Trapezoids

  • A trapezoid with non-parallel sides congruent.

Median Properties of Kites

  • A kite has two pairs of adjacent congruent sides.
  • The diagonals are perpendicular.
  • One diagonal bisects the other.

Ratio and Proportion

  • Ratio is a comparison of two quantities.
  • Proportion is an equality of two ratios.

Introduction to Similar Triangles

  • Similar triangles have the same shape but not necessarily the same size. Corresponding angles are congruent, and the ratios of corresponding sides are equal (proportional).

Scale Factor

  • The ratio between corresponding lengths of similar figures.

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Description

Explore the rich world of quadrilaterals and their classifications in this quiz. Test your knowledge of various properties and theorems related to quadrilaterals, including parallelograms, rectangles, rhombuses, and squares. Understand the sum of angles and key principles like the Pythagorean theorem as you delve into geometry.

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