Երկրաչափություն 24․09․21

18․

OB < OA, OC > OA, OB < OC

20-ա,գ․

ա) AC` B, AE` C, CE` D

գ) AE, BD

22․

լուծում․

AB < BD
EB = BC
AB + BC = AC
DB + BE = DE

Պատ․ DE > AC

ստուգում․

3 (AB) > 5 (BD)
1 (CB) = 1 (BE)
3 + 1 = 4
5 + 1 = 6

25-ա․

AOC` OB
BOF` OD
AOE` OC

27․

AOB = COD

29․

Այո։

AOE = BOF
AOC = BOC
AOC – AOE = BOC – BOF

ՏՆԱՅԻՆ․

20-բ․

This image has an empty alt attribute; its file name is image-43.png
This image has an empty alt attribute; its file name is image-44.png

բ) CE

21․

լուծում․

DE > AC
CB = BE
DE – BE = DB
AC – BC = AB

Պատ․ DB > AB

ստուգում․

7 (DE) > 5 (AC)
3 (CB) = 3 (BE)
7 – 3 = 4
5 – 3 = 2

23․

AOB > AOC

25-բ․

This image has an empty alt attribute; its file name is image-47.png
This image has an empty alt attribute; its file name is image-49.png

բ) AE, BD

26․

AOB = DOC
AOC = BOD

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