Problem Solving
How do you use what you have learned to problem solve?
Goal:
Goal:
Practice!
Goal: Define and classify triangles.
While Daniel was researching the Mediterranean Sea, he learned that many countries have ports that ship goods through that area. He also noticed that many of the flags of those countries have triangles on them. Click through the slides below to see these flags.
The Flag of Bosnia-Herzegovina
What kind of triangle is the yellow triangle above the stars?
The yellow triangle above the stars is a right triangle. It has one right angle.
The Flag of Israel
What kind of triangles are in the points of the star?
There are six equilateral triangles in the six points of the star. Each triangle has three sides that are equal in length.
The Flag of Palestine
What kind of triangle is the red triangle on the left-hand side of the flag?
This is an isosceles triangle. The two sides that meet in the middle of the flag are the same length.
The Flag of Eritrea
What kind of triangle is the red triangle in the middle?
This is an acute triangle because it has three acute angles. It is also an isosceles triangle.
The Flag of Jamaica
What kind of triangles are the green triangles on the top and bottom of the flag?
These are both obtuse triangles because they have one obtuse angle (the angles toward the middle of the flag). They are also isosceles triangles. As you can see, triangles can be more than one type. If they are two types, one is by angles and one is by the sides.
The Flag of Seychelles
What kind of triangle is the yellow triangle (the second one from the left)?
This is a scalene triangle. None of the side lengths are the same.
Question
Can a triangle be identified in more than one way?
Yes! One way to identify a triangle is by its angles. Another way is by its sides.