Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
In
△
D
E
F
\triangle DEF
△
D
E
F
,
∠
E
=
47
∘
\angle E = 47^{\circ}
∠
E
=
4
7
∘
and
∠
F
=
63
∘
\angle F = 63^{\circ}
∠
F
=
6
3
∘
. Side
E
F
EF
E
F
is produced to a point
G
G
G
. a. (i) Find
∠
D
\angle D
∠
D
. b. (ii) Calculate the exterior angle
∠
D
F
G
\angle DFG
∠
D
F
G
. c. (iii) Name the two interior opposite angles whose sum you have verified equals
∠
D
F
G
\angle DFG
∠
D
F
G
and write that equality.
Browse the problem library