Angles and Triangles Flashcards

Question 1

What is an acute angle?

Accepted Answer

An angle with measure $0^\circ < 	heta < 90^\circ$.

Question 2

What does it mean for two angles to be supplementary?

Accepted Answer

Their measures add to $180^\circ$: if angles are $a$ and $b$, then $a+b=180^\circ$.

Question 3

State the Exterior Angle Theorem for triangles.

Accepted Answer

An exterior angle of a triangle equals the sum of the two remote (non-adjacent) interior angles. If exterior angle is $E$ and remote interior angles are $A$ and $B$, then $$E=A+B.$$

Angles and Triangles Flashcards

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