Answer:

Step-by-step explanation:
A diagonal is defined in geometry as a line connecting to two non adjacent vertices.
Therefore, the minimum number of sides a polygon must have in order to have a diagonal n - 3 sides as the 3 comes from the originating vertex and the other two adjacent vertices
Given that the polygon has n sides, the number of diagonals that can be drawn from each of those n sides gives the total number of diagonals as follows;
Total possible diagonals = n × (n - 3)
However, half of the diagonals drawn within the polygon are the same diagonals drawn in reverse. Therefore, the total number of distinct diagonals that can be drawn in a polygon is given as follows;

Answer:
Bike=125 Skateboard= 74
Step-by-step explanation:
x + (x-51)= 199
2x-51=199
2x=250
x=125
125+ (125-51)=199
125+74=199
Answer:
13+2h
Step-by-step explanation:
The word "sum" can be related to "addition" and "13 and a number" is just "13" and an exponent.