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2) à = 5 äì; b = 3 äì; special-edu.kz.

Ð = ;

3) à = 3 äì 2 ñì; b = 10 ñì;
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Ð =

.

Òіê òөðòáұðûøòûң ïåðèìåòðіíің ôîð-

ìóëàñûí æàçûңäàð.

Өçіңäі өçің òåêñåð.

1) Ð = 2(6 + 4) =20 (ñì);

2) Ð = 2(5 + 3) =16 (ñì);
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3) Ð = 2(32 + 10) = 84 (ñì).

Òiê òөðòáұðûøòûң ïåðèìåòðiíiң ôîð-

ìóëàñû:

Ð = 2à + 2b, íåìåñå Ð = 2 (à + b) .

Ìұíäàғû Ð – òiê òөðòáұðûøòûң ïå-

ðèìåòði, à – ұçûíäûғû, b – åíi.

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Òiê òөðòáұðûøòûң ïåðèìåòði îíûң

ұçûíäûғû ìåí åíiíiң 2 åñåëåíãåí қî-

ñûíäûñûíà òåң.

Êâàäðàòòûң ïåðèìåòðiíiң ôîðìóëàñû:

Ð = 4à ,

138
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