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43. a| Hezaił Z£ = 110 . Cy.Ma cyciaHix KyTiB 180°.

ZA= 180°-110° = 70° .

OckLiłkii npoTHJiejKHi Kyra piBHi, mocmo ZA = ZC = 70° ; ZB=ZD = 110° .

ó> Hexan ZA jopiBHiot x, ockkiłkii npora.TejKHi kvth piBHi, to sam kyth cyci^Hi. ZR ^opiBHiot (.r + 70^:),

CyMa cyciaHii KyTiB (x + x + 70) , a6o 180^c.

* + * + 7 = 180; 2*+ 70 = 180; 2* = 110; * = 55 .

ZA =ZC = Ó5-, ZR = ZD = 125° .    .

b) OcK.i.TbKH cyMa cycinHis KyTiB, ISO^to ZjaHi^yrij nporaJlejKHi. ripora.YetfKHi Kyra napa.Te^orpaMa piBHi, •OT^cę,,C2A =\KŚ> = 90 : 2 =45" .

ZR = 180 -45 = 135\ . Z^/R'= Z I> = 135" hk nporajiejKHi kvth. r) Hexan Z RAC = 45° ; Z CAL) = 30^: , ZA = 45° + 30° = 75° ,

3a BjiaCTHBiCTIO BIIMipiOBaHHłi KyTiB.

ZA = ZC = 75" hk npoTHjTe>KHi kvth napajie.iorpaMa.

OckLtłkh cyMa cyciani* KyTiB 180 ZR = 180°-75° = 105° .

ZR = ZD = 105° , hk riporaaejKHi Kyra.

Ridnoeidb: a) 70°; 110°; TO⁵; 110°. 6) 55⁵; 125^:; 55^:; 125°. b) 45^c; 135°; 45°; 135⁵. r) 75°; 105⁵; 75^:; 105°.

Peiue6a.Mii