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Sagot :

Bonsoir,

Exercice 6

EF²= ED² + D

8²+ 15² = 64+225 =289

EF= √289 =>17cm

Exercice 7

MT² = MA² + AT²

MT² - AT²  =MA²

12,5² - 7,5² = 156,25 - 56,25=100

MA= √ 100 => 10 cm

Exercice 8

ST² = SR² + RT²

ST² - SR² =RT²

3² -2² = 9 -4 = 5

RT = √5 =>2,24cm

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