Math · Topic 48 of 65
Triangles
⭐ MasteredA triangle has three sides and three angles that always add up to 180 degrees. Triangles can be equilateral, isosceles or scalene, depending on their side lengths.
💡 Fun fact
Triangles are one of the strongest shapes, which is why they appear in bridges.
All about Triangles
A triangle is a shape with three straight sides and three angles that always add up to 180 degrees. Triangles are classified by their sides as equilateral, isosceles or scalene, and by their angles.
Triangles are very strong, which is why they are used in bridges and roof trusses.
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Real-life uses of Triangles
- Building strong bridges and roofs
- Designing road signs
- Measuring angles in geometry
Frequently asked questions about Triangles
How many degrees are in a triangle?
The angles of a triangle always add up to 180 degrees.
What is an equilateral triangle?
A triangle with three equal sides and three equal angles.