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Metal
Triangle Puzzle
Find the
Triangles Ice
Find the
Triangles Temple
K Inside a
Triangle
Triangle Puzzle
International Mathematical Acticities
How to Win Tricky
Triangle
Exterior Angle
Theorem Solve for X
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Triangle
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Triangle
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8:20
Khan Academy
Sal Khan
Worked example: Triangle angles (diagram)
We have a right triangle that's split into several smaller right triangles. The angle measures in any triangle always add up to 180 degrees. By using this fact and looking at complementary (adding up to 90 degrees) and supplementary (adding up to 180 degrees) angles, we can find the missing angle measures in the triangles.
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