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=4x2.1=8.4/2= 4.2
R/ El área del triangulo es 4.2cm
Datos:
Base = 4cm
Altura = 2,1cm
Formula.
Area Δ = Base * Altura/2
Area Δ = 4cm * 2,1cm/2 Simplificas el 2
Area Δ = 2cm * 2,1cm
Area Δ = 4,2cm²
Respuesta.
El area del Δ = 4,2cm²