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# Triangles g7

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### Triangles g7

1. 1. Triangleswww.mstfdemirdag.com
2. 2. Triangle:• A closed, three straight-sided shape is called a triangle.
3. 3. Naming triangles• Triangles are named according to the lengths of their sides, or the size of their angles.
4. 4. Naming triangles according to the lengths of their sides• Equilateral triangle:All three sides are equal in length. (Also all threeangles are equal in size.)
5. 5. Naming triangles according to the lengths of their sides• Isosceles triangle:Two sides are equal in length. (Also two anglesat the base are equal in size.)
6. 6. Naming triangles according to the lengths of their sides• Scalene triangle:No sides are equal in length. (Also no angles areequal in size.)
7. 7. Naming triangles according to the size of their angles• Acute triangle:All angles less than 90°.
8. 8. Naming triangles according to the size of their angles• Right triangle:Contains a right angle (90°).
9. 9. Naming triangles according to the size of their angles• Obtuse triangle:Contains an obtuse angle (greater than 90°).