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Mathematics 12 Online
OpenStudy (anonymous):

help please

OpenStudy (anonymous):

OpenStudy (anonymous):

@jim_thompson5910

Directrix (directrix):

Look at the attached triangle.

Directrix (directrix):

It is one of the 4 congruent triangles that make up the pinwheel.

Directrix (directrix):

Congruent triangles have the same area so if you get the area of this triangle, then you can multiply by 4 to get the area of the entire pinwheel.

Directrix (directrix):

By the 30-60-90 triangle theorem, the 60 leg is 5 times square root of 3. To get the area of the triangle, take 1/2 times the product of 5 and 5√3

Directrix (directrix):

Then, multiply by 4.

Directrix (directrix):

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