Posted by rebecca on Saturday, May 4, 2013 at 8:35pm.
Find the area of the regular polygon. Round your answer to the nearest tenth.
the individual sides are 10 the radius is 13.07
- math - Damon, Saturday, May 4, 2013 at 8:38pm
radius to what where with center where?
- math - rebecca , Saturday, May 4, 2013 at 8:47pm
the 10 is on one of the lines of the polygon then a line from the center
goes from the center to the edge of polygon inside with a doted line
- math - rebecca , Saturday, May 4, 2013 at 8:56pm
does that help
please help me with this
- math - Ms. Sue, Saturday, May 4, 2013 at 8:59pm
- math - Damon, Saturday, May 4, 2013 at 9:00pm
If your radius is to the corners, then
10 = 2* 13.07 sin (180/n)
sin (180/n) = .382555
180/n = 22.5
n = 8 sides
360/8 = 45 = top angle of each isoceles triangle
half of that has hpotenuse of 13.07 and base of 5
area of each of those 16 triangles = (1/2) (5)(13.07 cos 22.5) = 30.2
16*30.2 = 483
- math - rebecca , Saturday, May 4, 2013 at 9:03pm
- math - Damon, Saturday, May 4, 2013 at 9:08pm
If your radius is to the center of each side then
tan (360/2n) = 5/13.07
180/n = 20.93
n = 8.59 sides
I doubt if that is what it means so use my previous answer.
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