Classifying Triangles
Angles in Triangles
Triangle Inequality Theorem
Midsegments of Triangles
Similar Triangles
100
This triangle has all equal sides.
Equilateral triangle
100
Two rays with the same endpoint. The common endpoint is called a vertex.
Angle
100
A triangle is labeled ABC. What are the inequalities?
AB+BC= AC
BC+AC=AB
AC+AB+BC
100
The segment connecting the midpoints of the two sides of a triangle is parallel to the third side and is half its length.
Midsegment Theorem
100
What are the corresponding angles
A = X
C = Z
B = Y
200
This triangle has all angles less than 90 degrees
Acute triangle
200
Sides of the triangle.
Rays
200
All three inequalities must be ___ to be a triangle.
true
200
DE
200
Corresponding parts are ____?
proportional
300
This triangle has one angle that is greater than 90 degrees.
Obtuse triangle
300
What is the vertex?
B
300
A) 2+4>5, 4+5>2, 5+2>4
B) 6+8>14, 8+14>6, 14+6>8
300
DE
300
Triangle PQR is similar to trianlge LMN. Write the proportion that contains PQ and LN.
PQ/LM = PR/LN
400
This triangle had no equal sides.
Scalene triangle
400
Name the sides of this triangle.
YX and YZ
400
The lengths of 2 sides of a triangle are 5 feet and 8 feet. What is the range of possible lengths for the third side?
8-5 < x >8+5
3 < x > 13
400
x = 6
400
∠ABC = (2x + 30) °, ∠PQR = 55 ° and ∠ RPQ = 65 °, find the value of x.
x = 15°
500
This triangle has two equal sides.
Isosceles triangle
500
Name(s) of this triangle.
< ABC and <CBA
500
The lengths of 2 sides of a triangle are 10 inches and 5 feet. What is the range of possible lengths for the third side?
10-5 > x < 10 + 5
5 > x < 15
500
BF, FC, DE
AE, EC, DF
BD, DA, FE
500
Can you say two figures are congruent if their corresponding angles have the same measure?
No