Types of Triangles
Interior & Exterior Angles
Postulates & Theorems
Congruent Triangles
Misc. & Fun Facts
100
These types of triangles have all equal sides.
What are equilateral triangles?
100
The degree of angle "y" in this picture and how you solved it.
What is 115o using the Triangle Angle Sum Theorem?
100
Given Triangle CAB ≅ Triangle EFD (pictured below), the angle that is congruent to angle B.
What is angle D.
100
Given Triangle MLK ≅ Triangle STU (pictured below), the additional information needed to prove SAS and why.
What is line segment MK ≅ line segment SU because another side is needed to complete SAS.
100
The sum of the lengths of any two sides of a triangle is this when compared to the third side.
What is longer.
200
These triangles have two equal sides and two equal angles opposite these equal sides.
What are isosceles triangles?
200
The degree of "x" and why.
What is x=70o because they vertical angles.
200
This theorem states if the following triangles (see below) are congruent.
What is ASA since the triangles are congruent.
200
Given Triangle ABC ≅ Triangle DEF (pictured below), the additional information needed to prove AAS.
What is angle B ≅ angle E because another angle is needed to prove AAS.
200
The reason it is called a triangle, also from the Latin word triangulus or from the root "tri" meaning three.
What is "three-cornered" or "having three angles."
300
The reason why each interior angle in this type of triangle has to be this same degree.
What is 60 degrees an Equilateral Triangle because all angles are equal and add up to 180 degrees.
300
The degree of angle "z" in this picture and why.
What is z=58o using Triangle Angle Sum Theorem. ex: 180o-(52o + 70o)= 58o
300
This theorem is used to prove if the following triangles (see below) are congruent.
What is SSS because they are congruent.
300
Given Triangle MIS ≅ Triangle EIL (pictured below), the additional information needed to prove ASA.
What is angle S ≅ angle L because another angle is needed to prove ASA.
300
The number of triangles in the picture below.
What is 24. (The trick lies in factoring multiple smaller triangles into becoming a bigger triangle. This will produce six triangles in each row.)
400
The value of "x" and "y" from this picture.
What is x=60 degrees and y=60 degrees.
400
The equation needed to find the value of "x" in this picture.
What is (2x+40)+(2x-8)+92=180o.
400
Given Triangle WXY ≅ Triangle HJI (pictured below), these triangles are a specific type of triangle and why.
What are Isosceles Triangles because they have two congruent sides and two opposite angles that are equal.
400
Given Triangle RSP ≅ Triangle QSP (pictured below), the additional information needed to prove ASA.
What are angle RPS ≅ angle QPS because another angle is needed to prove ASA.
400
These two specific shapes that are created when a line is drawn in a rectangle from far corner to far corner.
What are two Right Triangles.
500
The EQUATION needed to find the value of x using the Exterior Angle Theorem.
What is 60o + x = 120o or 120o - 60o=x?
500
The equation needed to find the value of "y" in this picture and the theorem used.
What is y=(2x+40)+(2x-8) using the Exterior Angle Sum Theorem.
500
The equations needed to find the degree of angle JHI.
What are
180-114=66
66/2=33
500
The reason that the following triangles (pictured below) are NOT congruent.
What is AAA.
500
The reason the following triangle (pictured below) CANNOT exist in the real world.
What is an optical illusion?