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Curipod generated lesson: "Triangles". #8-10

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Updated 3 months ago

1. Word cloud
120 seconds
Name the three sides of a triangle.
2. Slide
60 seconds
"Classify triangles based on sides and angles."
Learning objective:
3. Slide
60 seconds
Triangles are 3-sided polygons with 3 interior angles adding to 180°. They can be classified by their side length and angle measurements as equilateral, isosceles, or scalene. The sum of the lengths of two sides of a triangle must be greater than the length of the third side.
Triangles: A Look at Their Properties
4. Slide
60 seconds
A triangle is a polygon with three sides and three angles. The angles of a triangle always add up to 180 degrees. The three sides of a triangle are known as the base, the height, and the hypotenuse. The hypotenuse is the longest side of a triangle, and it is opposite the right angle. The three types of triangles are scalene, isosceles, and equilateral. A scalene triangle has no sides that are equal, an isosceles triangle has two sides that are equal, and an equilateral triangle has all three sides equal.
5. Slide
60 seconds
The sum of the three angles of any triangle is always 180 degrees. The longest side of a triangle is always opposite the greatest angle. There are many types of triangles: equilateral, isosceles, scalene, right triangle, and obtuse triangle.
Did you know?
6. Slide
60 seconds
Angle Sizes
7. Slide
60 seconds
8. Open question
180 seconds
Work together in pairs: Which of the following is an example of an equilateral triangle?A) a triangle with three congruent sides and three congruent anglesB) a triangle with three congruent sides and two congruent anglesC) a triangle with three congruent angles and two unequal sidesD) a triangle with three unequal sides and three congruent angles
9. Open question
180 seconds
Work together in pairs: What are the three main types of triangles and what do they have in common?
10. Drawings
450 seconds
Brain break: Draw a dinosaur playing soccer with a flamingo.
11. Poll
60 seconds
What is the sum of the angles in a triangle?
  • 180 degrees
  • 90 degrees
  • 360 degrees
12. Poll
60 seconds
What do you call a triangle with three equal sides?
  • Equilateral Triangle
  • Isosceles Triangle
  • Scalene Triangle
13. Poll
60 seconds
What is the longest side of a right-angled triangle called?
  • Hypotenuse
  • Adjacent Side
  • Opposite Side
14. Poll
60 seconds
What do you call a triangle with only one angle greater than 90 degrees?
  • Obtuse Triangle
  • Acute Triangle
  • Right-AngledTriangle
15. Poll
60 seconds
If an equilateral triangle has a perimeter of 12cm, what is the length of each side?
  • 4 cm
  • 3 cm
  • 2 cm

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