Math 7 triangles and quadrilaterals
- 1. Classifying Triangles Subject: Geometry Grade Level: 7th grade
- 2. Antonetti Triangle Notes • Fold page in ½ • Students will take notes on one side and draw on the other.
- 3. Where can you find TRIANGLES? • Watch Animoto video!
- 4. Properties of TRIANGLES? • Watch Discovery Ed video!
- 5. Two Ways to Classify Triangles
- 6. Classifying Triangles By Their Sides • Scalene • Isosceles • Equilateral
- 7. Scalene Triangles • No sides are the same length
- 8. Isosceles Triangles • At least two sides are the same length
- 9. Equilateral Triangles • All sides are the same length
- 10. Two Ways to Classify Triangles
- 11. Classifying Triangles By Their Angles • Acute • Right • Obtuse
- 12. Acute Triangles • Acute triangles have three acute angles
- 13. Right Triangles • Right triangles have One right angle
- 14. Obtuse Triangles • Obtuse triangles have ONE obtuse angle
- 20. Triangle Degrees • The sum of the measures of any triangle is 180°. 70° x What is the measure of x?
- 21. Triangle DegreesTriangle Degrees 45° x What is the measure of x?
- 22. Triangle Degrees What is the measure of x? x 60° 50°
- 23. Side Measures • Draw triangles given 3 side measures. – “You Want Me to Do What?!” Worksheet
- 24. Angle Measures • Protractor Practice: – How to Use a Protractor – Independent Practice measuring angles and constructing angles • Construct triangles given (3) angle measures. • “Construct Triangles with Angle Measures” worksheet
- 25. Create Your Own • On a Scrap sheet of paper you need to: • Draw 3 triangles – 3 Different Sizes - Very Precise – Measure Sides and Angles (Label) – Put in a chart (See my example) • Classify Each triangle according to your notes. Triangle <1 <2 <3 Sum Classification by Angles Side 1 Side 2 Side 3 Classification by Sides 1 2 3
- 27. Quadrilateral Flowchart Give Student’s a copy of Flowchart… Brainstorm with your partner: Use the word bank to complete the Flowchart? Rectangle Rhombus Trapezoid Quadrilateral Parallelogram Square
- 29. What is a quadrilateral?What is a quadrilateral? A quadrilateral is a closed 2 dimensional figure with FOUR (4) line segments.
- 30. What is a parallelogram?What is a parallelogram? Opposite sides congruent Opposite sides parallel
- 31. What is a rectangle?What is a rectangle? Four right angles.
- 32. What is a rhombus?What is a rhombus? Four congruent sides.
- 33. What is a square?What is a square? 4 right angles 4 sides congruent
- 34. What is a trapezoid?What is a trapezoid? Exactly one pair of parallel sides
- 35. What are all of the names for this polygon?What are all of the names for this polygon? Quadrilateral Parallelogram Rectangle Which name best describes the shape?
- 36. What are all of the names for this polygon?What are all of the names for this polygon? Quadrilateral Parallelogram Which name best describes the shape?
- 37. What are all of the names for this polygon?What are all of the names for this polygon? Quadrilateral Parallelogram Rhombus Which name best describes the shape?
- 38. What are all of the names for this polygon?What are all of the names for this polygon? Quadrilateral Trapezoid Which name best describes the shape?
- 39. What are all of the names for this polygon?What are all of the names for this polygon? Quadrilateral Parallelogram Square Rhombus Rectangle Which name best describes the shape?