Answer: 137 degrees is size of other angle
Step-by-step explanation:
A straight line measures 180 degrees. If one angle is 43, then just subtract 180-43, and the difference is 137, which is the answer.
Answer:
Regular Pentagon
Step-by-step explanation:
A regular icosahedron is a twenty-faced polyhedron, each face being an equiangular triangle. Each vertex is joined together by 5 faces, therefore the polygon formed at each vertex is a regular pentagon.
We can also figure out the number of faces at each vertex using Euler's formula
F+V=E+2
F=number of faces = 20
E=number of edges = number of triangular faces * edges/triangle /2
(since each edge is shared between two faces)
= 20*3/2
=30
Number of vertices
= E+2-F = 30+2-20 = 12
So number of edges meeting at each vertex
= 30 / (12/2) = 30/6 = 5
(12/2 because each edge joins two vertices).
See attached figure, courtesy of Wikipedia.
It’s 6 my bad if I’m wrong
9x would be you answer why because you'll divide 5 and 1 which is 5 then you'll add 5+4 which equals 9 and then just add the X at the end so your answer is 9X