Solve for x.

x=12
The ______________________ of a triangle intersect at the circumcenter.
perpendicular bisectors
find ZY.

8.9
Determine whether the side lengths could form a triangle. Prove your answer with an inequality.
5 ft, 2 ft, 10 ft
No, 7>10
Classify the triangle center.

incenter
Find DH.

76
The ____________________ of a triangle intersect at the incenter.
angle bisectors


16.2
Determine whether the side lengths could form a triangle. Prove your answer with an inequality.
15 m, 50 m, 37 m
Yes, 52>50
Classify the triangle center.

orthocenter
Find SR.

57
The ________________________ of a triangle intersect at the centroid.
medians
find QV.
8.6
Given the measures of two sides of a triangle, find the range of values for the third side.
3 km, 48 km
45<x<51
Two sides of a triangle measure 19 cm and 34 cm, check all possible values for the third side.
21, 38, 52

108
The _______________________ of a triangle intersect at the orthocenter.
altitudes
the measure of angle FGE

x=2
FGE=60 degrees
Give the side lengths in order from least to greatest.

KM, LM, KL
List the sides of triangle FGH in order from least to greatest if m angle F = (15x – 7) ° , m angle G = (6x – 15) ° , and m angle H = (4x + 2) ° .
FH, FG, GH
If mnangle DEC = (12x – 3) ° , m angle BCE = (7x – 26) ° , and m angle DAE = 72° , find m angle DEC.

129 degrees
Classify the triangle center.

centroid
find PO and JN.

PO=8
JN=15
Compare the sides by filling in the blank with a < or > symbol.
BC>DE
List the angles of triangle AMK in order from least to greatest if AM = x + 13, MK = 4x – 3, AK = 9x – 22, and the perimeter of triangle AMK = 58.
angle A, angle K, angle M