Unit 7 - Triangles (Part 2) Test A

Front

What is the Triangle Inequality Theorem?

Back

The Triangle Inequality Theorem states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Front

Can the sides 16, 8, and 12 form a triangle?

Back

Yes, because 16 < 8 + 12, 8 < 16 + 12, and 12 < 16 + 8.

Front

Can the sides 8, 13, and 9 form a triangle?

Back

Yes, because 8 + 9 > 13, 8 + 13 > 9, and 9 + 13 > 8.

Front

How do you find the missing side length in a right triangle?

Back

Use the Pythagorean theorem: a² + b² = c², where c is the hypotenuse.

Front

What is the sine of an angle in a right triangle?

Back

The sine of an angle is the ratio of the length of the opposite side to the length of the hypotenuse.

Front

What is the cosine of an angle in a right triangle?

Back

The cosine of an angle is the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

What is the tangent of an angle in a right triangle?

Back

The tangent of an angle is the ratio of the length of the opposite side to the length of the adjacent side.

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 scalene triangle is a triangle with all sides of different lengths.

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle with at least two sides of equal length.