At IDNLearn.com, find answers to your most pressing questions from experts and enthusiasts alike. Discover the information you need from our experienced professionals who provide accurate and reliable answers to all your questions.

Alright, so I have a question that says this:
A regular octagon has sides mesuring about 4 cm. If the octagon is divided into 8 congruent triangles, each has a height of 5 cm. What is the area of the octagon?

I don't know if I divide my answer in half, like so:
5x4=20
Do I divide my answer in half now or go on to multiply 20 by 8?



Sagot :

octogon
sides=4
draw lines from the outside angles to the center so they form 8 equal triangle sections
find the area of each triangle and multiply by 8

area of triangle=1/2 base times height
base=4
the height is the distance from the center of one side of the octogon, to the center=5
so area=4 times 1/2 times 5=4 times 5=10

8 triangles so 8 times 10=80
the answer is 80cm^2
the diagram included below shows area for a pentagon
View image Apologiabiology