19biniasztear 19biniasztear

10-06-2020
Mathematics

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maempress maempress

10-06-2020

Step-by-step explanation:

SA=ph+2A, that is, perimeter × height+ twice area

p=21+20+29=70cm

h=22cm

70×22=1540cm

A=1/2 ×20×21=210×2=420

1540+420=1960cm2

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