Formula to find diagonals in a polygon
n(n-3)/2
What two things make figures congruent?
Same size AND same shape
Two triangles that have exactly the same size and shape
What is congruent
The triangle congruence theorems
SAS, SSS, ASA, AAS, RHL
lines that intersect to form a right angle
What is perpendicular
Two angles directly across from each other when two lines intersect
What is vertical
Draw and label two congruent figures
Wow!
A right triangle has one angle that is 45 degrees. What is the measure of the 3rd angle
What is 45 degrees
What is the converse of
If I studied for my test, then I will pass geometry?
If I pass geometry then I studied for my test.
A quadrilateral has 3 angles measuring 90 degrees, 100 degrees, and 70 degrees. What is the measure of the 4th angle?
What is 100 degrees
The slope of a line that is perpendicular to a line with a slope of 3.
What is -1/3
What is -1/3
If triangle ABC is congruent to triangle DOG angle BCA is congruent to what angle?
What is angle OGD
AK is the angle bisector of ∠JKN. Name the two congruent angles in corresponding order.
∠JKA ≅ ∠NKA
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
What angle is same side interior to angle 2
Angle 3
Two angles that will always form a 180 degree angle
What is linear pair or straight angle
If the point (1, 3) was translated over the x-axis, the new point would be
What is (1, -3)
If Isosceles ∆, then
Two sides ≅ and base angles ≅
What type of angles are 2 and 6
Same side interior
Corresponding Angles
Draw a triangle with a perpendicular bisector. Be sure to label the ≅ parts
Looks great!
Solve the midpoint for (-5, 2)and (8,-4)
What is... (1.5, -1)
Translate the point (3, 2) up 4 units and left 8 units. What are the coordinates?
(-5, 6)
Using the markings on the triangles name the method used to prove the triangles are congruent and write a congruence statement.
AAS
△ENR≅△VNR
This reason justifies statement 2 in the following proof.
What is a midpoint
Define CPCTC
Corresponding Parts of Congruent Triangles are Congruent.