Classifying Triangles
Triangle Side Lengths and Distance Formula
Triangle Theorems and Congruence Theorems
Proving Proofs
Teacher Lore
100
Classify triangle ECD by its angles.
Acute
100
Assuming this is an isosceles triangle with segment WX congruent to segment YX, Find the measure of segment WY
After finding x = 27,
WY = 5(27) -31 = 104
100
What is the measure of angle J in this triangle?
60 degrees
100
When working with proofs, this is information that we get to assume is true.
Given information
100
What is my favorite music genre?
Rock
200
Classify triangle BEC by its sides and angles.
Acute, Isosceles
200
Assuming triangle DEF is an Isosceles triangle, find the measure of segment DE.
After finding x=10
DE = 67
200
Assuming this triangle is equilateral, find the value of x.
7x-3 = 60
7x = 63
x = 9
200
What congruence theorem is needed to prove these two triangles are congruent?
SAS Congruence
200
What was the name of my pet Iguana?
Sheila
300
Classify this triangle by its sides.
Isosceles Triangle
300
Triangle JKL has its corners located at the following coordinates:
J(-3,2), K(2,6), L(8,-1)
Find the measure of segment KL.
d = sqrt((-1-6)^2+(8-2)^2
= sqrt(49+36) = sqrt(85) = 9.22
JL = 9.22
300
What is the measure of angle N?
76 degrees
300
What statement can be made in step 3, that ends up being justified by the definition of an Angle Bisector?
Angle BCA is congruent to angle DCA
300
What's my zodiac sign?
Gemini
400
Triangle ABC has the following side lengths:
Segment AB = 3, Segment BC = 4, Segment AC = 5
Classify the triangle by its sides.
Scalene Triangle
400
Triangle JKL has its corners located at the following coordinates:
J(-3,2), K(2,6), L(8,-1)
Find the measure of segment JK.
d = sqrt((6-2)^2+(2--3)^2
= sqrt(16+25) = sqrt(41) = 6.40
400
This triangle congruence theorem is a three letter combination that identifies two triangles have two corresponding angles and the side length between these angles.
Angle Side Angle (ASA) Congruence.
400
What missing statement and reason would complete this proof?
ALL or NOTHING for points on this question.
Statement: Segment BD is congruent to segment DB.
Reason: Reflexive Property
400
What grade was I in when I started struggling with math?
I was in 8th grade.
500
Classify this triangle by its angles.
Acute
500
Triangle JKL is an equilateral triangle with
segment JK = 13x+5, segment KL = 17x-19, and segment JL = 8x+35.
Find the value of x, and the measure of segment JL
After finding x = 6,
JL = 8(6)+35 = 83
500
Corresponding Parts of Congruent Triangles are Congruent (CPCTC) allows us to prove parts of triangles are congruent.
What are these parts, specifically? Incomplete answers will get half credit.
Sides and/or Angles.
500
What reasoning is missing to complete the proof?
4. Corresponding Angles
7. CPCTC
500
How old am I?
Wrong answers may or may not hurt my feelings, so be nice :p
I'm 30 years old (Unc Status)