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ta vẽ góc :
a)ta có góc mon = 900
b)==> 750
còn lại bạn tụ giải nha
đến giờ ăn cơm rồi
x z y m n 30'
tổng độ dài của cạnh AB và AC là:
360-150=210(m)
(a)Cạnh AC dài là:
(210+30):2=120(m)
Cạnh AB dài là:
120-30=90(m)
(b) Diện tích thửa vườn đó là:
120x90 :2 = 5400(m2)
Đáp số: (a)Cạnh AC :120m
Cạnh AB:90m
(b) Diện tích:5400m2