Properties of Polygons

vhenry, Mar 11, 2014

Table of Contents

  1. Angles
    1. 1.2a Define an Angle
    2. 1.2c Angle Name & Size
    3. Angle Names & Measures
    4. Elem-Middle CCSS Geometry Lab Guide (150+ Labs)
  2. Triangles
    1. ACCESS - Sum of Angles in Triangle
    2. Angle properties of Triangles
    3. Triangle angles and sides investigation
    4. Igra Kutovi trokuta / Triangle angles game
    5. 4.2 Isosceles Triangles
    6. Triangle Names and Angle Sum (Interior and Exterior)
  3. Quadrilaterals
    1. Properties of Quadrilaterals
    2. Properties of Quadrilaterals
    3. Properties of Quadrilaterals
    4. Investigating quadrilaterals.
  4. Similarity
    1. Nested triangle similarity problem
  5. Circles
    1. Circle Area (By Peeling!)

1.

Angles

  • 1. 1.2a Define an Angle
  • 2. 1.2c Angle Name & Size
  • 3. Angle Names & Measures
  • 4. Elem-Middle CCSS Geometry Lab Guide (150+ Labs)

1.1.

1.2a Define an Angle

Defining an Angle with Points and Rays
1.2a Define an Angle
– tzunfung

1.2.

–

1.3.

–

1.4.

–

2.

Triangles

  • 1. ACCESS - Sum of Angles in Triangle
  • 2. Angle properties of Triangles
  • 3. Triangle angles and sides investigation
  • 4. Igra Kutovi trokuta / Triangle angles game
  • 5. 4.2 Isosceles Triangles
  • 6. Triangle Names and Angle Sum (Interior and Exterior)

2.1.

ACCESS - Sum of Angles in Triangle

Drag the points to adjust the angles of the triangle. What pattern do you see in the angles of the triangle?
– Accesscd

2.2.

–

2.3.

–

2.4.

–

2.5.

–

2.6.

–

3.

Quadrilaterals

  • 1. Properties of Quadrilaterals
  • 2. Properties of Quadrilaterals
  • 3. Properties of Quadrilaterals
  • 4. Investigating quadrilaterals.

3.1.

Properties of Quadrilaterals

Properties of Quadrilaterals
– battism

3.2.

–

3.3.

–

3.4.

–

4.

Similarity

  • 1. Nested triangle similarity problem

4.1.

Nested triangle similarity problem

Nested triangle similarity problem
– khurley1

5.

Circles

  • 1. Circle Area (By Peeling!)

5.1.

Circle Area (By Peeling!)

[b][color=#c51414]Questions for Extension and Application:[/color][/b][br][br][color=#1551b5]1) Was the "triangle" formed truly a triangle? Explain why or why not. [br][/color][br][color=#1551b5]2) What would we need to do to the number of "peels" in order to make the so-called "triangle" formed look[br] more smooth (like a true triangle) vs. a "choppy" triangle? [/color][br][br][color=#1551b5]3) Suppose an above-the-ground circular swimming pool has a radius of 12 feet. What is the area of the exposed surface of the water it contains? [br][br]4) Suppose a circular track (that surrounds grass) has a circumference of 500 feet. If 3 bags of grass seed are needed to be spread out across every 100 square feet of grass in the circular region inside this track, determine how many entire bags of grass seed will be needed to cover the entire area of the circular region surrounded by this track. [br][br]5) Suppose a 12-inch pizza (pizza with diameter = 12 inches) costs $12.00. Suppose a 24-inch pizza costs $24.00. Which pizza is the better buy? Explain why this pizza is the better buy. (Assume both pizzas have the same thickness.) [br][/color]
– Tim Brzezinski

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