Mon Prof Augmenté
Triangle Angles on a Line
Age 12 · Maths
The three angles of a triangle can be placed together. They then form a straight line, which is 180 degrees.
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In the picture
- The triangle: a three-sided shape with three angles
- The red angle: one angle of the triangle, detached
- The blue angle: another angle of the triangle, detached
- The green angle: the third angle of the triangle, detached
- The straight line: the three detached angles placed together
Examples
- A triangular slice of pizza: its three angles can be arranged into a straight line.
- A triangular road sign: its three angles together form a straight line.
Key takeaways
- The three angles of any triangle add up to 180 degrees.
- Placed together, the three angles form a straight line.
Quiz: Triangle Angles on a Line (Age 12)
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What do the three angles of any triangle add up to?
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When the three angles of a triangle are placed together, what do they form?
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The straight line formed by the three angles is how many degrees?
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