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# FIND PERIMETER AND AREA OF IRREGULAR FIGURES?

find perimeter area of a rectangle with a triangle on top

### 3 Answers

- Anonymous1 decade agoFavorite Answer
seperate the triangle from the rectangle by drawing a straight line through them. For the rectangle do l*w=a . easy enough.

for the triangle do 1/2(b*h)

then add them together.

for the perimeter add together each the lengths of all the sides that are on the outside, The sum is the total perimeter.

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- 1 decade ago
calculate the area of the triangle and rectangle separately and add them up to get the area.

Find the perimeter of the triangle and rectangle separately, add them up, and subtract the side they share. (Principal of Exclusion and Inclusion)

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- sippialLv 43 years ago
to discover the area of an strange parent, you should divide it into widespread figures like sq., rectangle, good triangle or any style of a triangle. (that's how Geodetic Engineers be sure the completed area of somewhat bit land or lot). Then, you are able to now truthfully compute for the agreggate factors of those figures employing straight forward geometric or trigonometric area formulation. Afterwhich, you upload them to get the completed area. To get the edge of that strange parent, you should degree or compute the outer guy or woman edges/segments employing geometric or trigonometric formulation based on the fashioned mixture widespread figures, then upload them at the same time to get the fringe. To get the circumferrence of an strange curve, or arc of a around figures like circle, ellipse and so on, the main useful thank you to estimate their circumferrence without complicated calculation is using a paper-strip technique. that's finished by skill of aligning the straight away edge of the paper strip alongside the straight away component of the arc. Then mark the preliminary factor the place the beginning up of length is to be achieved alongside the line and paper strip at the same time. Mark the line alongside the curve and paper the place the straight away line of the curvature ends. Repeat this technique until all curvature is measured/marked. Then get the completed length of the marked paper strip from the preliminary factor as much as the tip employing a foot rule or a tape degree.

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