Basic Triangle Angles
$100: The sum of the interior angles in a triangle.
What is 180 degrees?
$100: An exterior angle of a triangle is formed by one side of the triangle and this.
What is the extension of another side?
$100: A triangle with two equal sides is called this.
What is an isosceles triangle?
$100: The point where the three angle bisectors of a triangle intersect.
What is the incenter?
$100: If two angles of a triangle are 50 and 60 degrees, this is the third angle.
What is 70 degrees?
$200: The name for a triangle with one angle measuring 90 degrees.
What is a right triangle?
$200: The sum of all exterior angles of any polygon, including triangles, is this.
What is 360 degrees?
$200: A triangle with three different side lengths is known as this.
What is a scalene triangle?
$200: The line segment from a vertex to the midpoint of the opposite side.
What is a median?
$200: A triangle with angles 30, 60, and 90 degrees is a special type of this triangle.
What is a right triangle?
$300: A type of triangle where all three interior angles are equal.
What is an equilateral triangle?
$300: The exterior angle measure is greater than either of these two interior angles.
What are the remote interior angles?
$300: An equilateral triangle also falls under this category of triangle based on angles.
What is an acute triangle?
$300: The point where the three medians of a triangle intersect.
What is the centroid?
$300: If one angle of a triangle is 40 degrees, the measure of the adjacent exterior angle is this.
What is 140 degrees?
$400: A triangle with all angles less than 90 degrees.
What is an acute triangle?
$400: If one exterior angle of a triangle is 110 degrees, the sum of the two remote interior angles is this.
What is 110 degrees?
$400: A triangle with one angle greater than 90 degrees is called this.
What is an obtuse triangle?
$400: The line segment perpendicular to a side of a triangle that passes through the opposite vertex.
What is an altitude?
$400: If the exterior angle of a triangle is 120 degrees, the opposite interior angle measures 30 degrees, then the other interior angle measures this.
What is 60 degrees?
$500: In a triangle, the measure of an exterior angle is equal to the sum of these.
What are the two non-adjacent interior angles?
$500: The term for the type of angle that is formed when a side of a triangle is extended, also called an external angle.
What is an exterior angle?
$500: In this type of triangle, the bisector of each angle also acts as the median and the altitude.
What is an equilateral triangle?
$500: The point where the three altitudes of a triangle intersect.
What is the orthocenter?
$500: The interior angles of a triangle measure x, 2x, and 3x. The value of x is this.
What is 30 degrees?