👤

Sagot :

Réponse:

a)BC=3,4

DE=3,4

DC=3,4

Aire pour rectangle ABCF=

5,1×6,8=34,68cm^2

Aire pour carre DCE=3,4×3,4=11,56cm^2

aire total= 34,68+11,56=46,25cm^2

b) triangle RTO=

3×5×1/2= 7,5cm^2

Triangle RGI=

4×2×1/2=4

Aire total=7,5+4=11,5cm^2

c)Aire d'un circle=πr^2

=3,14×3,4^2

=3,14×11,56

=36,2984 cm^2

© 2024 IDNLearn. All rights reserved.