3.1-3.2 Topic Check

Front

What is the classification of a triangle with one angle greater than 90 degrees?

Back

Obtuse triangle.

Front

What is the classification of a triangle with all sides of different lengths?

Back

Scalene triangle.

Front

According to the Triangle Sum Theorem, what is the sum of the interior angles of a triangle?

Back

180°.

Front

Can the lengths 8, 10, and 20 be the sides of a triangle?

Back

No, they cannot form a triangle.

Front

What is the Triangle Inequality Theorem?

Back

The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Front

How do you order the sides of a triangle from least to greatest?

Back

Compare the lengths of the sides and arrange them in ascending order.

Front

What is the smallest side in a triangle with sides DE, VE, and DV if DE < VE < DV?

Back

DE.

Front

What is the definition of an acute triangle?

Back

A triangle where all angles are less than 90 degrees.

Front

What is the definition of a right triangle?

Back

A triangle that has one angle equal to 90 degrees.

Front

What is the formula for calculating the area of a triangle?

Back

Area = 1/2 * base * height.