Bajar­ing va o‘rganing. Bo‘yalgan uchburchaklarning yuzini toping. d) Uchburchak asosining qismlari 40 cm va 15 cm, balandligi 25 cm.

Avval uchburchak asosini topamiz:

\(a=40+15=55\text{ cm}\).

Endi yuzini hisoblaymiz:

\(S=\frac{55\cdot 25}{2}=687.5\text{ cm}^2\).

Javob: 687,5 cm².