Show:
Angles
Parallel & Perpendicular
Triangles
Construction
Pairs of triangles
100
Angle whose measure is 90°
What is right angle
100
Two lines that intersect to form a right angle
What is perpendicular
100
A triangle with all sides different lengths
What is scalene
100
A ray that shares a vertex with an angle and divides the angle into two congruent angles
What is an angle bisector
100
Two triangles that have exactly the same size and shape
What is congruent
200
Two angles whose sum is 90°
What is complementary angles
200
Two lines that are perpendicular to the same line
What is parallel
200
A triangle with all angles having a measure less than 90 degrees
What is acute triangle
200
The segment from a vertex of a triangle perpendicular to the opposite side
What is altitude
200
If triangle ABC is congruent to triangle DOG angle BCA is congruent to what angle?
What is angle OGD
300
Two angles whose sum is 180 degrees
What is supplementary angles
300
Two lines that intersect to form a right angle
What is perpendicular
300
A triangle with a least two sides the same length
What is isosceles
300
A line passing through the midpoint of a segment at a 90 degree angle
What is a perpendicular bisector
300
Two triangles that have congruent angles and proportional sides
What is similar
400
Two angles directly across from each other when two lines intersect
What is vertical
400
Two angles that share a side and together form a line
What is linear pair
400
An angle formed when a side of a triangle is extended outside the triangle
What is exterior angle
400
A segment from the vertex of a triangle to the midpoint of the opposite side
What is a median
400
If triangle ABC is similar to triangle DOG and AB = 12, DO = 9, and AC =20, then DG has what measure?
What is 15
500
Two angles who share a side and a vertex and don't overlap
What is adjacent angles
500
When two lines are cut by a transversal, both angles are inside the two lines but are on opposite sides of the transversal
What is alternate interior angles
500
The measure of a third angle of a triangle when one angle is 42 degrees and another is 90 degrees
What is 48 degrees
500
The slope of a line that is perpendicular to a line with a slope of 3.
What is -1/3
500
If triangle ABC is similar to triangle DOG and AB = 8, DO = 12, AC = x and DG = x+4, what is x?
What is 8