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Grade 10 Math · Problem type
Which angle is largest?
Use this for “A triangle has sides 5, 7 and 9. Which angle is the largest? The smallest?”
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Where does the angle rank in its triangle?
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Assumptions
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In a triangle, the largest angle is across from the longest side.
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The smallest angle is across from the shortest side, and the middle one across from the middle side.
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It works the other way too: the longest side is across from the largest angle.
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Quadrilaterals and other polygons: angle sums and properties
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Relationships within triangles: bisectors, medians, midsegments and inequalities
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