JL has coordinates J(-6, 1) and L(-4, 3). Find the coordinates of the midpoint.
(-5, 2)
These lines all intersects at the circumcenter.
What are Perpendicular Bisectors
CD has coordinates C(-1, 9) and D(-7, 1). If EF is parallel to CD, what is the slope of EF?
4/3
Complete the proof:
1. Given
2. Corresponding Angles
3. Given
4. Angle-Angle-Side
Given ΔJKL, find m∠L.
47°
∠A and ∠B form a linear pair. If m∠A = (6x-19)° and m∠B = (11x - 22)°, find m∠B.
121°
Classify the triangle center
What is an INCENTER
Line l is shown on the graph below. If another line is drawn perpendicular to line l, what must be the slope?
Undefined
In ΔDEF, DE = 29 feet, EF = 26 feet, and DF = 32 feet. What is the order of angle measures from largest to smallest?
∠E, ∠F, ∠D
Which of the following side lengths could form a triangle? List all that apply.
A. 7, 7, 15
B. 21, 24, 43
C. 16, 14, 9
D. 16, 3, 8
E. 10, 21, 11
F. 32, 35, 39
B, C, F
Which pair of lines must be parallel?
p and r
Classify the triangle Center:
What is a CENTROID
Give the equation of a line parallel to the line
x - y = 5
y = x + 5
A triathlon event in which participants run, bike, and swim certain distances is mapped out in a triangle as shown below.
Which distance (swim, bike, run) is the longest?
Swim
Given XZ bisects ∠WXY and ∠WZY.
Angle-Side-Angle (ASA)
If a ∥ b, find the value of x.
x = 18
Find AE.
G is the centroid of triangle ABC if AG = 42
63
If l ∥ m and m∠8 = 109°, what is the m∠5?
71°
Jasmine is making a triangular garden Two sides of the garden measure 6 feet by 11 feet. What is the range of possible lengths, in feet, for the third side, x, of the garden?
5 < x < 17
Which pair of triangles cannot be proven congruent?
D
If c ∥ d, which statement must be true?
A. ∠1 ≅ ∠16
B. ∠7 ≅ ∠10
C. m∠14 + m∠15 = 180°
D. m∠6 + m∠10 = 180°
D
Find EH.
H is the circumcenter of triangle BCD,
BC = 18 and HD = 14.
10.7
Which pair of segments must be parallel?
AB and GH
If the angles of triangle RST:
m< R=(9x-2); m< S=(4x+36); and m<T=(5x+20)
list the side lengths in order from SHORTEST to LONGEST.
RS, ST, RT
What piece of information would prove ΔACE ≅ ΔBDE by Side-Angle-Side?
E bisects AB and CD