The minimum number of triangles needed to construct a polygon is 4. which is the name of the polygon?
a) octagon
b) hexagon
c) heptagon
d) quadrilateral

Option B. Hexagon

Step-by-step explanation:

The minimum number of triangles needed to construct a polygon is always represented by (n - 2) where n is the number of sides.

Now we put the values of n.

for n = 3 number of triangles = (3 - 2) = 1

for n = 4 number of triangles = (4 - 2) = 2

for n = 5 number of triangles = (5 - 2) = 3

for n = 6 number of triangles = (6 - 2) = 4

We have got the answer.

If minimum number of triangles are 4 then polygon formed is Hexagon where number of sides n = 6.

Option B. Hexagon is the answer.

step-by-step explanation:

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116