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Identify the lateral area and surface area of a regular triangular pyramid with base edge length 14 cm and slant height 15 cm

L = 630 cm2 ; S = 484.7 cm2
L = 630 cm2 ; S = 399.9 cm2
L = 315 cm2 ; S = 484.7 cm2
L = 315 cm2 ; S = 399.9 cm2

Respuesta :

amna04352

Answer:

D) L = 315 cm2 ; S = 399.9 cm2

Step-by-step explanation:

Lateral area;

3 × (½)(14)(15)

315 cm²

Surface area:

315 + (½)(14)(14)sin(60)

399.8704896 cm²

MB2000
Answer would be D L=315 cm2 ; S=399 cm2