Respuesta :
Answer: 21.15
Explanation:
Half base (4.5cm)X 4.7cm = 21.15
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Explanation:
Half base (4.5cm)X 4.7cm = 21.15
If I helped please mark me brainliest
Formula for triangle- 1/2(BxH)
1/2(9x4.7)=21.15cm
1/2(9x4.7)=21.15cm