Triangles

Front

What is the sum of the interior angles in a triangle?

Back

The sum of the interior angles in a triangle is always 180°.

Front

What type of triangle has one angle greater than 90°?

Back

An obtuse triangle has one angle greater than 90°.

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle in which all three sides and all three angles are different.

Front

Define an acute triangle.

Back

An acute triangle is a triangle where all three angles are less than 90°.

Front

What characterizes a right triangle?

Back

A right triangle is characterized by having one angle that measures exactly 90°.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides are equal in length and all three angles are equal, each measuring 60°.

Front

How do you find the measure of the third angle in a triangle if two angles are known?

Back

To find the measure of the third angle, subtract the sum of the two known angles from 180°.

Front

What is the relationship between the sides and angles in a triangle?

Back

In a triangle, the largest angle is opposite the longest side, and the smallest angle is opposite the shortest side.

Front

What is the Pythagorean theorem?

Back

The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides (a² + b² = c²).

Front

What is the difference between a right triangle and an obtuse triangle?

Back

A right triangle has one angle that is exactly 90°, while an obtuse triangle has one angle that is greater than 90°.