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Consider Theorem 5.10 about Angle-Side Relationships in Triangles.
Angles: ∠J, ∠K, ∠L
Sides: LK, JL, JK
To find the order of angle measures and sides from smallest to largest, let's look at the given diagram and consider the given measures.
We take notice the measure of ∠K is missing. We can use the Triangle Angle Sum Theorem to find the missing measure.
m ∠J + m ∠K + m ∠L=180 ^(∘)
m∠J= 46, m∠L= 87
Add terms
LHS-133=RHS-133
We will add this information to our diagram.
Therefore, we see that ∠J is the smallest angle, followed by ∠K and then ∠L.
m ∠J
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Angle-Side Relationships in Triangles |
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If one angle of a triangle has a greater measure than another angle, then the side opposite the greater angle is longer than the side opposite the lesser angle. |
Now, by this theorem, we will look for the corresponding opposite sides. cc Angle & Opposite Side [0.5em] ∠J & LK [0.5em] ∠K & JL [0.5em] ∠L & JK Therefore, we can list the sides in order from smallest to largest. LK < JL < JK