Which four angles are interior angles?

J

K

L

M

N

O

P

Q

Correct!
Which pair of angles are congruent?

L

M

N

O

YES
By which theorem do we know 
these angles are congruent?

These angles are not congruent
Try again

Which four angles are exterior angles?

J

K

L

M

N

O

P

Q

Correct!
Which pair of angles are congruent?

K

J

Q

P

YES

These angles are not congruent
Try again

Alternate Interior Angles

Consecutive Interior Angles

Correct!

Try again

θ = 0.8901179185171081 rad (slider from 30*° to 150*°, step 1*°)
A = (11, 2)
B = (4, 2)
A' = Rotate(A, θ, B)
J = Angle(A, B, A')
c = Line(B, A')
C = Intersect(a, c)
D = (11, 0)
N = Angle(a, c)
E = Point(b)
F = Point(a)
G = Point(c)
Q = Angle(G, C, D)
M = Angle(C, B, A)
K = Angle(A', B, E)
L = Angle(E, B, C)
P = Angle(F, C, G)
O = Angle(B, C, F)
d = Segment(A', G)
j = false
k = false
l = false
m = false
n = false
o = false
p = false
q = false
l_1 = false
m_1 = false
n_1 = false
o_1 = false
j_1 = false
k_1 = false
l_2 = false
m_2 = false
n_2 = false
o_2 = false
p_1 = false
q_1 = false
l_3 = false
m_3 = false
n_3 = false
o_3 = false
e = false
f = false