Question

[phung ngoc bi mat]

cho tam giac abc lay m la diem diem chinh giua bc

a,so sanh dien tich tam giac abm va dien tich tam giac acm

b,so sanh dien tich tam giac abm va dien tich tam giac abc

lam giup minh nhe

Answer 1

[VuiLaChinh]

a) M điểm giữa của BC nên CM = MB

Tam giác ABM và tam giác ACM có : đáy CM = MB, chung đường cao tương ứng với đáy.

Nên S(ABM) = S(ACM)

b) S(ABC) = S(ABM) + S(ACM) mà S(ABM) = S(ACM)

Nên  \(S\left(ABM\right)=\frac{1}{2}S\left(ABC\right)\)

Answer 2

[phung ngoc bi mat]

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