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Mathematics 40 Online
OpenStudy (anonymous):

What is the perimeter of the following polygon? 50 units 48 units 47 units 46 units

OpenStudy (anonymous):

OpenStudy (anonymous):

You should use Pythagoras theorem for this. Do you know how?

OpenStudy (anonymous):

Isn't it C=a+b ?

OpenStudy (anonymous):

No c^2 = a^2 + b^2

OpenStudy (anonymous):

Okay so c is?

OpenStudy (anonymous):

Half the base = 8 units. Let this be a. The line that bisects the base is 15 units and is perpendicular to base. So Pythagoras theorem can be used here to find the length of the two equal sides.

OpenStudy (anonymous):

Let 15 units be b. Let length of the equal sides be c. a^2 + b^2 = c^2 8^2 + 15^2 = c^2 64 + 225 = c^2 c^2 = 289 c = sqrt289 = 17 Finding the perimeter should be easy now.

OpenStudy (anonymous):

Did you get the answer?

OpenStudy (anonymous):

wait @anncandy

OpenStudy (anonymous):

I'm still working on it, I'm not very good at geometry.

OpenStudy (anonymous):

pratu was the corect

OpenStudy (anonymous):

Is it 48units?

OpenStudy (anonymous):

No, its 50 units. You must have made some addition mistake.

OpenStudy (anonymous):

Can you explain to me how'd you get your answer?

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