Wednesday

September 17, 2014

September 17, 2014

Posted by **Spirit** on Thursday, October 12, 2006 at 3:58pm.

my side lengths are 5cm

i have split it in to triangles so

360/n

is the central angle

then to work out area of singular triangle its 1/2 base times height

height is something like

tan 180/n =2.5 /height length

please help i get stuck here

The sum of the interior angles is (180)(n-2). So each angle in your triangle is half that, divided by n

angle= 90/n * (n-2)

height= 2.5 tan (90/n (n-2))

Put in n, and you have height.

area for the polygon then is n*area of each triangle, where the area of each triangle is 1/2 bh= 1/2 *5*habove.

I need help to answer this question. (n-2)*180=90

- maths please help -
**Anonymous**, Saturday, October 8, 2011 at 7:56pmIf a triangle has a height of 12 in. and a base of 5 in., what is its area?

A. 60 sq. in.

B. 45 sq. in.

C. 30 sq. in.

D. 90 sq. in.

**Answer this Question**

**Related Questions**

maths - 1.how many non congruent right triangles with positive integer leg ...

physics - On an aerial photograph of a triangular piece of land the lengths of ...

math - Find the exact value of cos 300 degrees. thanks guys cos 300 = 1/2 = 0....

Math - If the scale factor from a small figure to a large figure is given as a ...

maths urgent - Plz help me solve these sums i will be great full 1.How many non ...

Math - If all of the following triangles have the same perimeter, which has the ...

Math - Determine the number of triangles that could be drawn with the given ...

>_< - The 3 sided triangle has an area of 14 in^2. Determine the lengths ...

math - suppose you use the rule (3x+1,3y-4) to transform the original figure ...

Math - Two triangles r the same height. The slope side of triangle A is double ...