22-23 Unit 5 Flashcard 1 Review (5.0/5.2)

Front

Can the sides of a triangle have lengths 3, 4, and 9?

Back

No, the sum of the lengths of any two sides must be greater than the length of the third side.

Front

Name the largest angle in a triangle with angles ∠D, ∠E, ∠F.

Back

∠E is the largest angle.

Front

If two sides of a triangle are congruent, then the _________________ opposite those sides are congruent.

Back

angles.

Front

What is the third angle of a triangle whose 1st angle is 34° and 2nd angle is 101°?

Back

45°.

Front

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______.

Back

180°.

Front

What is the definition of a triangle?

Back

A polygon with three edges and three vertices.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is an equilateral triangle?

Back

A triangle with all three sides of equal length.